So I have a Cane Corso Mastiff and his name is bear and he is about about 15 months and I feed him pretty good I feed him dog Chow however he is spoiled he only likes chicken flavored dog food will not eat beef well not eat steak only chicken now I can make some hamburger meat in with that chicken or I can add some ham bones or other meat in that chicken flavored dog food but no other flavor dog food other than chicken will eat he's a pretty big boy I feed him raw eggs two times a week and his food he does like carrots and other food items that are good for him but the question that I have is I want to make his muscles a little more stronger and for him to be a little more lean and toned up is there anything other than giving them as much protein as I can that I can do for him