I tried adding yogurt to Bella's breakfast (greek plain) after I had got her switched successfully to the dry dog food she is currently on...results: extreme cannonbutt!!!! OMG it was 2 am and dark outside and even though I couldn't see her in the yard, the sounds were unmistakable (and verified by sight the next morning!! So, I just thought too soon, and put it aside. Then about 3 weeks ago I started adding a fish oil capsule to her breakfast, all good. After two weeks of that going well, I tried adding the yogurt back in at her lunchtime. Results: TOTAL CANNONBUTT again!!!! Is it possible she is still too young to digest it, or possible she might have issues with "dairy" products?