Where do you get health mash on Howrse?

most yards supplies it

In order to get health mashes, you need to board your horse at an equestrian center that currently has health mashes in stock. You can find out if a center has health mashes by looking at the icons next to the name of each center. If there is a red rectangular-shaped icon next to the name of a center, it means the center has at least one health MASH in stock. You cannot buy health mashes from any of the shops on Howrse and you can only give a health mash to your horse if your horse's health is lower than 100%.