It is all personal preference about what you choose to feed your baby, but it does pay to be informed. You can do some research about poultry by-products and animal by-products in general and decide if you want to keep feeding it to your little one. I would also be nervous about the whole corn, as corn is such an
inflammatory, it tends to make more pups than not very itchy. Many develop allergies and intolerance to corn and wheat. That said, if you like it and are happy with it, go for it.
Oh, and I am totally not against Nutrena. I feed my horses who are high-level athletes their concentrates from the Nutrena line, and I have been extremely happy with it.