Jolly Mega Ball by Horsemen's Pride. This heavy duty inflatable ball is made specifically for horses. This durable exercise ball that can be used for enjoyment or training and is a favorite of Natural Horsemanship practitioners. Comes ready to inflate with a foot pump. 
Product Details: 
Inflatable Ball 
Foot pump is included 
Available Sizes: 25", 30" and 40" 
Be sure to choose the appropriate size ball that corresponds with the size of your horse. 
To ensure continued long lasting enjoyment, store your Jolly Mega Ball™ indoors when not under supervised use.