chow

Whats up guys Im new to the forum and have a quick question. I just purchased my first American Bully and was wondering what you guys feel would be the best puppy chow to start my new guy on in order to establish a good base weight?

I know this might sound biased but I have own an APBT probably mixed with bully and he is 9mths, a hyper but friendly pup and very well behaved. He knows basic commands and gives me no problems with putting a leash on him. My mom on the other hand has 2 chow mixes who don't know any basic...

I'm starting to think that Vegas needs large breed chow. His fronts are starting too look a bit funky. I don't know if regular puppy chow is too rich or what. I'm really thinking he qualifies as a large breed puppy. :/ What do you guys think? I want to make sure he grows properly.