advantage or frontline will work, also get flea control carpet deodorizer, also make sure you feed him good dogfood, that cheap shit sucks, i use the nutro max lamb & rice dry dogfood (only $30 for 40lbs at petco & petsmart), they got it for large breed puppies too. if u brush every week u wont get any hair around your crib with a boxer (with good food). to give him a nice shiny coat, put a raw egg in the dry food once a week.
and leash train him now! it'll never be as easy while he's young.