I used this for my convalescing dog to guard against an upset tummy when she came out of the vet hospital and back onto her normal diet. She consumed it readily when mixed with a little natural yogurt, whereas normally it can be very hard to get anything like wormers/herbal remedies down her. Used in conjunction with natural yogurt and Dorwest Tree Barks powder, I was very relieved to find she had near normal stools. I can't say whether it would work for chronic digestive problems, but I would definitely use it again, and was much happier with this than the Protexin Bio Premium (which I wouldn't use again).