We have feed our cat Purina Indoor cat chow since he was a baby, in fact he refuses to eat anything else. He won't eat canned catfood at all. Boots is a very healthy cat. But we have friends that have feed their cats expensive food sold at the vets office, and their cats are constantly battling urinary infections and even cancerous tumors. I always thought it was because of the higher protein levels in some cat foods. An indoor cat does not need the higher protein levels that a outdoor cat might need. But maybe I am mistaken, maybe it is corn.
Do you think it could be related to the increasing use of GMO corn, not only in our foods, but in pet foods as well? It could be changing the way the cats body digestion breaks down the food that is not fit to eat. It seems if it's not pet food from China, it is our own manufactures using cheaper fillers and only thinking of their own bottom line and not the safety or quality of the pet food they produce.