We found this product in the tack shop at a horse show when our OTTB mare had the 'runs' due to heat and stress. Gastro EQ was like a miracle and we had great results within an hour or so. We now use it as preventive treatment at shows in hot temps, and otherwise when needed. Gastro EQ seems to be really palatable and can be mixed in with feed, making it super easy to administer! I have this on autoship for the show season so we're always stocked up. Can't say enough good things about this product!