Our 6-month-old kitten was on an all wet food diet until earlier this week when we went to the vet and found out that she has juvenile gingivitis and has to have some dry food in her diet. We switched her back to a 1/4 of a cup Purina Pro Plan which she was getting as a younger kitten but now she has blood on her **** after she poops. I know it's the food because she had the problem once before and when we changed to wet food it stopped. Should we switch to a different dry food? Any ideas?