I feed my cats Purina, have for years. I had a cat two years ago die from mouth cancer. She had a huge tumor in her upper lip. I feel so horrible for feeding her something that caused her so much pain! I am researching alternatives right now, but they are all owned by the same few DS companies. Maybe I will start researching what nutrients they need and I will make it myself! I can't believe it, I should have known better. Now the question is, can we trust the food WE are eating??