I'm very worried about my 2yr old bully Camden. About a yr ago he had an allergic reaction to something not sure still what it was. The vet put him on iams skin and coat vet formula. He did great and his skin cleared up. One day he ran out of food and I ran to the store and got him a bag of regular iams. Now he is red in the face and losing hair on his head. I did some research and decided on Natures instinct. It's been two weeks we is only eating the new food but continues to get worse. I was going to go to the vet tomorrow and get more of the iams skin and coat. However, it is rated 1 star and the money is not an issue when it comes to Camden there is nothing I won't do for him. Any suggestions of a quality food would be appreciated or should I give the nasty red instinct a little more time?