I really like Ruff Luv for my boy- he has this sweatshirt and I LOVE it-
Ruff Luv Navy Blue Glitter Snowflake Dog Hoodie I have a lot of other stuff from them too and love it!
I know people say there is a lot more for girls but I really don't have a hard time finding stuff for my boy either- he has tons of clothes- sweaters, hoodies, t-shirts. Some places I find good stuff in stores is PetCo and WalMart.