Horses confined in a stall become bored quickly. Horses can become stressed from boredom. There are many different ways a horse will show its boredom. Some of the things a bored horse will do is wood chewing, cribbing, repetitive weaving,
flank biting, box walking, nodding, windsucking, or destruction of items the 
stall (buckets, feeders, etc)
To alleviate the stress of your horses, you should supply items to stimulate their mind.
The Jolly Stall Snack for horses is ideal for helping to relieve boredom in your horse’s stall. It is a fun, sturdy apple shaped snack holder. It will not only help with boredom, but is a great way to give your horse a nutritious treat. Available in three flavors – apple, carrot, mint and molasses.
The Jolly Stall Snack will bring interest to your horse. It can be batted around with his nose, but most of his effort will be spent trying to get to the snack.
The Jolly Stall Snack is easy to hang. Tip: Be certain to position it in the middle of the stall rather than near the wall. Horses quickly learn how to press it against walls for easy access to the snack. Be sure to follow feeding instructions that are included with treat