Tag Archives: mat targets

Smooth ‘Walk On’ and ‘Halt’ Transitions

INTRODUCTION:

‘Walk On’ and ‘Halt’ are the foundation of pretty much everything we want a horse to do with us. Even teaching ‘parking’ starts with a solid, confident ‘halt’.

Teaching the basic ‘walk on’ and ‘halt’ is most easily done in position beside the horse’s neck or shoulder. I like to teach these with a ‘multi-signal’ or ‘signal bundle’. In the science literature multi-signals are referred to as “a compound stimulus”.

Using the multi-signals consistently from the beginning means that once the horse knows them well, I can use any one of them, or any combination of them, depending on what best suits the situation. It makes it easier for the horse to recognize the signals when I am walking beside his ribs or behind him (outside his blind spot).

PREREQUISITES:

  1. Horse and handler are clicker-savvy.
  2. Horse readily targets stationary objects with his nose and/or feet. (See ADDITIONAL RESOURCE 5. at the end of this post.)
  3. Horse is comfortable wearing a halter and lead rope.
  4. It’s highly recommended to practice the rope handling mechanical skills to signal ‘walk on’ and ‘halt’ first with a person standing in for the horse. Simulations are a wonderful way to get our body language and rope handling skills organized and smooth before we inflict ourselves on the horse.

MATERIALS AND ENVIRONMENT:

  • Horse in a familiar area where he is comfortable.
  • Other horse buddies in view, but not able to interfere.
  • Horse is not hungry and in a relaxed frame of mind.
  • Halter and lead. A relatively short lead rope is easier to manage.
  • Destination objects. These can be a series of stationary nose targets, mats as foot targets. Alternatively, we can use a Frisbee or old cap thrown out ahead for the horse to target, then thrown forward again.

AIM:

Elegant ‘walk on’ and ‘halt’ transitions with the horse and handler staying shoulder-to-shoulder, with the handler on either side of the horse.

VIDEO CLIPS:

‘Walk on’ signals are illustrated in HorseGym with Boots clip #129.

‘Halt’ signals are illustrated in HorseGym with Boots clip #131.

NOTES:

  1. What you see Boots doing in the video clip is a result many short sessions over a long time.
  2. We can aid the horse’s understanding if we begin teaching this along a safe fence to remove the horse’s option of swinging the hindquarters away from the handler.
  3. We want to strive for consistently staying in the area alongside the horse’s neck and shoulder.

Photo to illustrate Slice 3 below. A ‘halt’ signal without pulling on the halter: hold the rope straight up into the air and jiggle it lightly. We can use this as part of our ‘halt’ multi-signal if necessary. We can also use it during the process of teaching backing up with a hand gesture signal staying shoulder-to-shoulder with the horse. Teach it as a ‘halt’ signal by using it as the horse approaches a fence or other dead-end where it makes total sense for him to halt .

SLICES:

  1. Hold the rope in the hand nearest the horse with no pressure on the halter. If you need to send a ‘halt’ signal with the rope, hold the rope straight upwards and jiggle it. The instant the horse responds, stop jiggling, breathe out and lower your hand.
  2. Halt: Ask the horse to walk beside you toward a familiar mat. As you approach the mat, use the following multi-signals almost simultaneously:
  • Visibly drop your weight down into your hips (like we want the horse to do).
  • Breathe out audibly.
  • Say ‘whoa’ or whatever halt voice signal you decided.
  1. Only if necessary, raise the inside hand holding the rope straight up into the air and jiggle the rope. If the horse is initially taught the ‘rope jiggle’ halt signal using a fence or a blocked-off lane, there will be little need to jiggle the rope. As the horse halts on the mat, immediately relax your body language; breathe out; click&treat.
  2. At first, pause briefly before walking on to the next mat; click&treat. Gradually, over many sessions, teach the horse to wait confidently for up to 10 seconds.
  3. Walk On: Ensure you are holding the rope in the hand nearest the horse with no pressure on the halter. To send a ‘walk on’ signal along the rope, reach across with your outside hand and run it gently up the rope toward the halter. As soon as the horse moves, take away your outside hand.
  4. We use our ‘walk on’ multi-signals almost simultaneously:
  • Look up toward the next destination.
  • Breathe in audibly and raise your body energy. Horses are very conscious about our breathing, so this can become an important signal if we use it consistently.
  • Run your outside hand gently up the rope toward halter to a point to which the horse responds by shifting his weight to step forward. This will eventually become a simple arm gesture without needing to touch the rope.
  • Step off with your outside leg (easier for horse to see).
  • Say ‘walk-on’ (or whatever voice signal you’ve decided). A voice signal is useful later when working at liberty, exercising on a long line, or guiding from behind, as in long-reining.

Our aim is to initiate the first intention of movement, then move in synchronization with the horse. It’s important not to move off without the horse, so losing our position beside the horse’s neck or shoulder.

People often tend to start walking without first inviting the horse to move in sync with them. The whole point of this exercise is to move forward together companionably, staying shoulder-to-shoulder.

  1. Each time you halt, you have another opportunity to practice the ‘walk on’ multi-signals. Each time you ‘walk on’, you have another opportunity to practice your ‘halt’ multi-signals.
  2. Every time you come to a destination marker, drop your hips and your energy, breathe out, say your voice signal and relax; click&treat. Pause, then politely use your ‘walk on’ multi-signal to ask the horse to walk forward with you to the next destination marker.
  3. It won’t take the horse long to realize that each destination marker is a ‘click point’. He will soon begin to look forward to reaching each destination. He will also begin to organize his body to halt efficiently. Horses love to know what will happen before it happens. Remember, they have four legs and a long body to organize, so begin your ‘halt’ signals well before you reach the destination.
  4. Many short sessions will show improvement in suppleness and body management more quickly than occasional long sessions.
  5. Be sure to teach this in both directions and on each side of the horse. Spending a little time on this, over many sessions, will build a lovely habit of walking with you on a loose rope.

In a way, although you have the horse on a rope, you are allowing him to self-shape the most efficient way to set himself up to halt at the next marker ready for his click/treat. Because the horse has worked out his way of halting for himself, he has more ‘ownership’ of the task.

Over time, walking together companionably will become a strongly established habit. As mentioned in Generalization 2. below, we can gradually introduce the ‘whoa’ as our click point, which means we can phase out using destination targets. The horse will comfortably walk with us until we signal for a ‘halt’. Of course, we must reliably reinforce each halt request with a click&treat.

GENERALIZATIONS:

  1. Gradually increase distances between destinations.
  2. Gradually introduce ‘whoa’ as the click&treat indicator to replace nose or foot targets. Start by asking for ‘whoa’ between destinations. (See ADDITIONAL RESOURCE 2. below.)
  3. Add objects and obstacles to your training spaces to walk through, across, over, weave among. (See ADDITIONAL RESOURCES 3. & 4. below.)
  4. Walk together at liberty. (See ADDITIONAL RESOURCE 1. below.)
  5. Walk together in different venues including public places with slopes, water, trees.

ADDITIONAL RESOURCES:

  1. Clip: Walking Together at Liberty: https://youtu.be/fD5lWQa6wmo
  2. Clip: 20 Steps Exercise with halter & lead: https://youtu.be/kjH2pS1Kfr8
  3. Clip: Precision Leading: https://youtu.be/2vKe6xjpP6I
  4. Clip: Walk & Hock Gym: https://youtu.be/R62dP1_siaU
  5. Blog about mats: https://wp.me/p4VYHH-5S9

 

 

 

 

 

 

 

 

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TARGET SHOULDER TO HAND

INTRODUCTION:

In the photo above Boots is leaning her weight toward me to connect with my hand which I held a small distance away from her shoulder.

Teaching the horse a signal to target his shoulder to our hand fits in nicely after we have taught him a signal to yield his shoulder away from us.

PREREQUISITES:

  • Horse and handler are clicker savvy.
  • Horse is mat-savvy.
  • Horse is comfortable standing ‘parked’ with the handler standing alongside. To review, check out my ‘Using Mats’ blog.
  • Handler has developed his/her ‘zero intent’ and ‘intent’ body language. To review, see the clip #153 HorseGym with Boots: Zero Intent and Intent toward the end of this blog or check out the ‘Zero Intent’ and ‘Intent’ blog.

ENVIRONMENT & MATERIALS:

  • A work area where the horse is relaxed and confident.
  • Ideally, the horse can see his buddies, but they can’t interfere.
  • The horse is not hungry.
  • Halter and lead (kept loose) and a safe, enclosed area for working at liberty, if possible.
  • Mat.
  • For generalization, a hoop, ground rail, mounting block or similar.

AIM:

Horse confidently moves his left or right shoulder toward the handler’s ‘outstretched hand’ gesture signal.

Video Clip:  #160 HorseGym with Boots: TARGET SHOULDER TO HAND

 

Note:

When we request the shoulder to yield away, we project energy at the horse’s shoulder from our body’s core at the belly-button which causes our posture to be upright.

When we request the shoulder to move toward us, it is important to pull our belly-button back so that we create a ‘draw toward me’ energy with our whole body. Horses are so sensitive to advancing and receding energy from another body, that they easily read the intent of our posture as long as we are totally consistent and not sloppy.

SLICES:

Stay with each slice until it feels ho-hum and smooth for both of you.

Make each session extremely short, 2-3 minutes. The magic is not in the final result as much as it is in the process of helping the horse figure it out.

  1. Ask the horse to park squarely; click&treat.
  2. Take up a position shoulder-to-shoulder with the horse and relax; click&treat. Work up to standing together quietly for five seconds before the click&treat, on each side of the horse.
  3. Reach out the flat back of your hand to lightly touch the horse’s shoulder; click&treat the moment your hand makes contact.
  4. Take up the ‘no intent’ or ‘zero intent’ body position and wait to see if the horse is okay for you to carry on. If he continues to stand in a relaxed manner, he is probably okay to carry on, or you may have sorted out one or more ‘okay to proceed’ signals.

ZERO or ‘NO’ INTENT POSITION

  1. Repeat 3 and 4 above, watching for any weight shift the horse makes toward your hand as you move it toward his shoulder. If he does, celebrate hugely with happy words and a jackpot or triple treat. Avoid the urge to see if he will do it again. Wait until your next session.
  2. When you feel the time is right, hold your hand a tiny distance away from touching the shoulder and WAIT for the horse to shift his weight to make the contact; click&treat. Some horses may step toward you to make the contact right away. For either one, celebrate hugely once again. Maybe do it once or twice more to consolidate the idea.
  3. It took Boots a couple of weeks of daily mini-sessions before she consistently leaned toward my hand to make the contact. Then it took more days before she confidently stepped toward my hand when I held it further away.
  4. Decide whether you want to continue teaching on the side you started with, or if you want to teach slices 1-6 on the other side of the horse before proceeding.
  5. When 6 is ho-hum, gradually hold your hand a little bit further away so the horse must take a sideways step to contact your hand; click&treat.
  6. Whenever the response seems slow or unsure (or is missing), go back to touch the shoulder; click&treat. Then work forward again at a rate that keeps the horse being continually successful as much as possible.
  7. When starting a new session, always introduce the task with a shoulder touch; click&treat, to let the horse know which game you are playing.
  8. Work to having the response equally smooth on either side of the horse.
  9. If the horse is mat-savvy, lay a mat beside the horse to act as a destination. Place the mat so the horse takes one step over to reach it. Gradually increase the distance to get two steps, then three steps.

GENERALIZATION:

  1. Turn on the haunches: ask the horse to step around to complete one/quarter of a circle (90 degrees). When that is smooth, work toward 180 degrees, and finally a full turn on the haunches (360 degrees). It can take a while to build confidence to do more than a quarter or half circle keeping the hind feet relatively in one place.
  2. Repeat 1 above on the other side of the horse. Because our bodies and the horse’s body are asymmetrical, one side is usually easier. It helps to do a bit more on the harder side until, after lots of short sessions, both sides feel smooth.
  3. Add a hoop (made so it comes apart if it catches on the horse’s leg) to the turn on the haunches exercise. This increases the level of difficulty, so start at the beginning with just one step and work up very gradually. Be careful not to make the horse feel wrong if he steps out of the hoop with a hind foot. If he does step out, quietly walk away together and return for a reset. The video clip demonstrates where I got too greedy, wanting too much, and it blew Boots’ confidence for a while.
  4. Keep each session super short and celebrate each new success hugely. This exercise enhances foot awareness.
  5. Stand the horse with his hind end nearer the mounting block than his shoulder, step on the block and ask him to bring his shoulder over so he is in the mounting position.
  6. If you want to focus on the horse moving toward you in a straight line, rather than in a circular pattern as above, stand the horse over a rail and see if he will bring his hind end along. If not, leave moving straight for now until you teach the ‘ribs toward me’ lessons.
  7. When shoulder to hand is smooth, start again at the beginning with ‘ribs to hand’. Follow the exact same procedure but start with a touch to the center of the ribs instead of the shoulder.

 

Chaining Behaviors

INTRODUCTION:

Chaining behaviors refers to linking together individual tasks into a flow of activity. The photo above shows how we chained repetitions of the task, “Go touch the cone” in order to build confidence walking down the road away from home. Once the horse understands this game, the cones can be put further apart, less in number and eventually phased out and replaced with items naturally found along the route to use as click&treat spots.

We might aim for one click&treat at the end of a series of behaviors. Alternatively, we might click for each specific behavior in the chain, or for two or three behaviors within the chain that easily link into each other.

We can also back-chain, where we begin with the last behavior in the series, and gradually link in each previous behavior. If we specifically want the horse to do a series of behaviors with only one click&treat at the end, this method can work well.

People who have spent more time studying ‘chaining’ in detail prefer to start with a concept called ‘sequencing’.  They then describe different kinds of sequences.

Tandem Units – when each part of the sequence is exactly the same. Examples are  the ‘cone-to -cone’ exercise in the photo above and the 20 Steps Exercise outlined below.

Conjunctive Units – when there is a sequence to be done, but they could be done in any order. For example, if we have a selection of obstacles set out to do gymnastic exercises with our horse, we can do them in any order.

Chained Units – step one of the sequence must occur before step, 2, step 2 before step 3, and so on. For example, saddling or harnessing a horse. Another example might be walking into the pasture, haltering the horse, walking back to the gate with the horse, opening the gate, asking the horse to walk through the gate, closing the gate, which is outlined in one of the clips below.

When we train by splitting a goal behavior into its smallest teachable units (slices), we link the slices together as the horse becomes competent with each bit of new learning. In most cases, the sequence is important, so each slice is part of a chained unit. The example below about Head Rocking illustrates.

Something like a dressage test, horse agility course, jumping course or western equitation course is made up of discrete units or behavior (conjunctive) but the competition requires them to be done in a strict order, so they become ‘chained’. We can train each unit in a ‘conjunctive’ context, then present them in the required chain for the competition.

CHAINING FORWARD TO CREATE DURATION (A sequence of ‘tandem units’)

This clip clearly shows how we can create a chain of ‘duration’ of the same behavior (tandem units). 20 Steps Exercise

 

This clip is the same as the one above but done with halter and lead and a handler new to the exercise. #30 HorseGym with Boots: Leading Position Three Duration Exercise. Increasing duration of a behavior is basically increasing the number of ‘tandem units’ before we click&treat. The units might be steps, as in this exercise, or they might be increasing time staying parked or they might be the number of times your horse paws if you are teaching him to count.

CHAINING THIN-SLICES TO CREATE A COMPLEX TASK

This clip shows how we first train, then chain, tiny components of a task (slices). As the horse understands each slice, we ask for a bit more or a new variation before the next click&treat. This clip is an introduction to building confidence with pushing through pairs of horizontally set pool noodles. We start with the simplest unit and gradually work up to more complexity, so this is an example of mostly chained units

 

This clip is an introduction to head rocking. The slices are quite tiny and are steadily chained together to accomplish the final task. Since the order or units matters, it is a true chained sequence.

 

CHAINING A SERIES OF TASKS THAT OCCUR IN A PARTICULAR ORDER

This clip looks at how we chain a series of tasks when we do something like bringing our horse in from a paddock. Usually I would do the whole process with one click&treat after putting on the halter, and another when I take off the halter. The horse has previously (separately) learned each of the tasks that make up this chain of events.

 

The clip below looks at using a mat to help chain a series of tasks. #12 HorseGym with Boots: CHAINING TASKS. This could be seen as an ‘artificial’ chain because we have decided on the order of the tasks. They could be done in any order so turning it into a conjunctive chain.

 

The clip below shows a series of more difficult tasks. Each task is individually taught to a high standard. Then I forward chain or back-chain them together according to the requirement of that month’s competition.The order of the tasks has been arbitrarily set for the competition, so this too is an ‘artificial’ chain made up of a series of unrelated tasks.

TRAINING PLAN FOR BACK-CHAINING ROPE-FREE CIRCLE WORK

Back-chaining simply means that we begin with the final behavior in a series and work backward toward the eventual starting point.

PREREQUISITES:

  • Horse and handler are clicker savvy.

ENVIRONMENT & MATERIALS:

  • A work area where the horse is relaxed and confident.
  • Ideally, the horse can see his buddies, but they can’t interfere.
  • The horse is not hungry.
  • Halter and lead to introduce the idea to the horse.
  • Safe, enclosed area for working at liberty.
  • Objects to create the circle outline, as in the video clip or set up a raised barrier.

AIMS:

The horse moves willingly on the outside of a circle of objects, firs to  mat destination, later listening for a ‘whoa’ signal.

Back-Chaining Circle Work with a Mat (see video below)

If we want to teach a horse to move in a circle around the outside of a round pen, we can use a mat as the horse’s destination and back-chain a whole circle at walk and a whole circle at trot (energetic horses may offer a canter).

The set-up requires a round pen of ground or raised rails or tape on uprights or a collection of items to outline the circle. The horse walks around the outside of the barrier and the handler walks on the inside of the barrier.

SLICES:

Note: Keep the sessions very short – just a few minutes. We never want to turn anything into a drill. Five minutes a day over a few weeks will give a lot of results.

Stay with each slice until both you and the horse are totally comfortable with it.

With halter and lead:

  1. Lead the horse around the circle and have him target the mat with his feet; click&treat. Repeat until the horse has a strong association with the mat due to always receiving a click&treat there.
  2. Walk the horse and halt a few steps away from the mat. (Horse is on the outside of the barrier, handler on the inside.)
  3. With a looped rope (or unclip the rope if you are in a safe, enclosed area) ask the horse to ‘walk on’ to the mat; click&treat. Snap on the lead rope, walk around the circle and repeat 2 at the same distance until the horse keenly heads to the mat. Walk along with the horse, at the horse’s pace, inside the barrier.
  4. Gradually halt further from the mat before asking the horse to go target the mat. If he loses confidence, return to a smaller distance. Better to increase the distance by very small increments rather than ask for too much too soon. Click&treat each arrival at the mat.
  5. If the horse offers a trot at any time (or a canter) and stays on the circle, celebrate hugely. Such willingness is precious.
  6. When the horse willingly offers a whole circle, celebrate large with happy words and a jackpot or triple treat.
  7. When it is good in one direction, teach it again, from the beginning, walking in the other direction.
  8. Make the task more interesting by putting the mat in different places on the circle.
  9. Once you have whole circles, and you are in a safe area where you can work without the lead, leave it off. This allows you to gradually walk a much smaller circle as the horse stays on his big circle on the outside of the barrier. Click&treat each time the horse reaches the mat. He will soon realize that even if you are a distance away from him when you click, you will quickly walk to him to deliver the treat. Some horses get anxious when they can’t stay right next to the handler.
  10. Play with 9 until you can just rotate in the center of the circle as the horse walks around.
  11. If you’d like to work with trot, and the horse has not already offered it, start again with slice 2 and use your body energy to suggest a trot. If your horse knows a voice ‘trot’ signal, use that too. Celebrate if he trots to the mat.
  12. If you like, gradually make your circle larger.

This is back-chaining because you have shown the horse the final result which will earn the click&treat (targeting the mat) and then added in the previous requirements, which in this case were increasing distances from the mat. In the final behavior, the mat is both the starting point and the end point.

If you are wondering about how we can get multiple circles this way, we can eventually use our ‘halt’ signal to replace the mat and ask the horse to do more than one circle (in gradual increments) before asking him to halt for his click&treat.

 

Example 2:  Back-chaining a 10-task Horse Agility Course (based on the clip before the one immediately above)

  1. Consolidate the final task: Trot through the plastic bottles and halt on the tarp for a click&treat.
  2. Back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  3. Trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  4. Trot through the z-bend, trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  5. Through the pool noodles, trot through the z-bend, trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  6. Trot through scary corridor of flags, through the pool noodles, trot through the z-bend, trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  7. Drag the bottles, trot through scary corridor of flags, through the pool noodles, trot through the z-bend, trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  8. Weave five markers, drag the bottles, trot through scary corridor of flags, through the pool noodles, trot through the z-bend, trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  9. From halt, trot off the tarp, weave five markers, drag the bottles, trot through scary corridor of flags, through the pool noodles, trot through the z-bend, trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.
  10. Walk onto the tarp and halt, trot off the tarp, weave five markers, drag the bottles, trot through scary corridor of flags, through the pool noodles, trot through the z-bend, trot through the curtain, back up seven steps, halt, then trot over the plastic bottles and halt on the tarp for a treat.

Back-chaining works well when we want/need to consolidate the place and time for the click&treat at the very end of a sequence of events.

 

Using Mats: Parking or ‘Stationing’ and Much More

An easy way to teach parking with duration is to use mats as foot targets. Mats can be anything safe for the horse to put his feet on. My horses were especially fond of a small piece of foam mattress.

The series of video clips in this post begin with introducing a horse to mats, and go on to explore building duration on the mat.

PREREQUISITES:

  • Horse understands the basics of clicker work.
  • Handler can consistently time the click/marker sound to the desired action.

ENVIRONMENT & MATERIALS:

  • A work area where the horse is relaxed and confident.
  • Horse is not hungry.
  • Ideally, the horse can see his buddies, but they can’t interfere.
  • Halter and lead (with no pressure on lead) if you don’t have a space where the horse can be at liberty.
  • One mat to begin with, then a variety of different mats.

AIMS:

  • To encourage the horse to explore an object and make up his own mind that it is harmless.
  • To encourage the horse to see a mat as a desirable spot because standing on it always results in a click&treat.
  • To build duration stayed relaxed standing on a mat.

SLICES:

  1. Lay out a mat well away from the horse while the horse is watching.
  2. Stand back and observe the horse’s responses.
  3. Click & walk to the horse to deliver the treat if:   a) he looks at the mat.   b) he steps toward the mat.   c) he sniffs the mat.   d) he touches the mat with a foot.   e) he paws at the mat, click the moment he stops pawing.
  4. One he has put a foot on the mat, move the horse or pick up the mat and toss it away, and go back to observing, repeating 3 above.
  5. If the horse shows little interest in the mat, put a treat he really likes on it and show him it is there.
  6. If you are working alone, it may be easier to have two mats and as he eats the treat on one mat, you can be putting another treat on the other mat.
  7. #6 HorseGym with Boots demonstrates introducing the mat target after the horse has learned about nose targets.
  8. #124 HorseGym with Boots is another look at introducing the mat.
  9. Once the horse confidently heads over to put his feet on a mat as soon as we set one out, we can begin to build duration staying on the mat. #8 HorseGym with Boots looks at building duration.
  10. Once the horse loves going to mats due to a strong history of reward reinforcement, we can use mats as parking spots for things like waiting tied up, grooming, foot care, vet care.

I’ve found that carpet stores are happy to give away their old carpet sample books. They are amused when I tell them what I want them for.

#14 HorseGym with Boots is the very first introduction of a young horse to the idea of stepping on something and it was also new for the young handler. 

The following videos look at generalizing mats to a variety of situations.

 

#9 HorseGym with Boots looks at putting mats ‘on cue’ or ‘on signal’.

 

#10 HorseGym with Boots looks at mats in different places and using different kinds of mats.

 

#11 HorseGym with Boots looks at more generalization with a ‘Mat-a-thon’.

 

#15 HorseGym with Boots looks at the horse staying parked at a distance.

 

#18 HorseGym with Boots looks at the horse staying parked while the handler goes out of sight.