hello everyone! i have an 8 month old boxer and he has problems when he runs. maybe it has something to do with his legs because he was caged for 2 months by the owner and just did some trainings for him. now, he's learning to walk and run but when he runs, he runs sideways.. is there anything that i can do? also, how can i make him gain weight? what food and how will i feed him? i have optima hi-pro now, is that fine? what else will i feed him for him to eat alot? pls try to help me on this.. thanks!