Grey Wolf Entero Aid is a lifesaver!
My vet prescribed the paste a year ago for my senior Yorkie. Maggie takes it prior to an injection which may cause her diarrhea and also when she has a pancreatitis flare up. Maggie is 17 years old and with chronic pancreatitis, she has diarrhea about once a month. Typically the paste will get it under control within a day.
Buying it from Cascade was a lot cheaper than buying it through my vet. I highly recommend it!