I'm currently feeding Major Purina One chicken and rice. He just turned 11 mos. and is only 49 lbs. He's a very tall boxer, in fact, he's taller than any boxer that he's seen at the dog park, etc, but he isn't as filled out as them. There's one that is 13 mos. and 58lbs, and shorter, but more filled out. I was considering switching him to Innova Evo food. I'm happy with the Purina, but I want him to get the best nutrition that he needs. I realize that boxers are slow growing and it takes them 2-3 years to reach full size, and I'm not trying to rush his growth, but I'm just wondering. He has a lot of loose skin that he needs to grow into still too. Like handfulls lol. The other thing too is I don't want him to get fat either. I want any weight to be muscle. Which I'm sure it will be, because he is in constant motion and really runs ALOT.