I am at a loss anymore! I have two kits, a brother and sister. They are almost 9 months. We got them at two months and since we’ve got them they have both had belly issues. I have a good regiment for them and was feeding Royal Canin Digest Sensitive. However, it is pricey and I tried to switch to Purina One with similar ingredients. The cats immediately had terribly lose stools with even one teaspoon of the new stuff. So I stopped and back fully on Royal Canin. But now, they won’t eat that either! I don’t know what to do anymore any suggestions