I picked it up at Tractor Supply Company. If you have those and can't find it in the horse section, check the dog section. They also have a website. I think it is www.tsc.com
. It is fabric safe, however, if he is nipping at YOU you might want to let him know you are serious with smacking him on his chest (or cheek if he is as persistent and hard-headed as my boy is), or back him up with a vengeance rather than letting him have a chance to taste the "Bitter Yuck!" It does work well for reins and leadropes, a friend is trying it now on the side of the barn where her horse has started chewing.