Hi, I recently rescued a pit bull/bull dog mix who is 5 years old and underweight. We tried feeding her a mix of Beneful hard kibble and Weruva canned food, after the first few weeks strictly on Weruva. After a week of the mixed food, she had diarrhea and vomiting and we placed her a bland diet for a week or so. What food would anyone recommend for a sensitive tummy, that will help my pit gain weight? I appreciate feedback! Claire