
Milk is far more likely to cause upset tums than anything else, just about. Many dogs have a lactose intolerance, and often it's just not recognised as such. However, mine do like a little live plain yogurt, and this seems to have the opposite effect, even made with cow's milk. Possibly the bacteria convert the lactose to lactic acid which is better tolerated. (Only guessing - I'm not a food scientist)
Jo and the Casblaidd Flatcoats