I really like many of the products from Nature's Farmacy. Katie doesn't mind the taste, and I have given some to friends, and all of their dogs love it on their food. I think it really helps. Ann, (Wylie's Mom) recommended this to me. I posted a link to the one I use, but I'm sure the others are good too.
DOGZYMES Probiotic Max 8 oz » Natures Farmacy Inc. THE FORGOTTEN ORGAN IN OUR BODIES??? DO YOU KNOW WHAT IT IS? | Natures Farmacy Inc.