I think I read a post from you about allergies? Well this is what we think of purina.... He should already be on a quality dog food. We have a food ratings page here and I'm sure you can find lots of choices for Winston. I believe Purina might be a 1 rated food..which is the lowest rating there is!! Don't blame yourself..I'm sure you are doing what the breeder told you. But now you can make the correct healthy choices your Winston needs! My Jake is nearly 1 ..he gets Fromm Beef Fritatta..1cup in am and pm. Now..what works for one bully sure doesn't work for all..it's the hardest part of a healthy Bully! Whatever food you decide to try..make sure you do a slow transition. Otherwise Winston will probably have an upset tummy! Please read the article about dog food ratings..then explore all the great choices you have!