I use it on my PSSM mare she has been feeling great this year. I have used their products for years and have liked everything I have tried. Great company, family owned and they sell quality products.
I have been using their products for years. Great company! I use Exceed and Gastro-Plex. I believe they have a money back guarantee on their products..I've never needed to use it, but you could ask about that for In Sync. Ask for Allison when you call. She's great!