Looks slightly like a boxer, but the snout is way too short.
It could be one of those "AKC" boxers, but I couldn't tell unless I had a full body shot. The AKC boxers are a really poor quality breed of boxers. They go by a general dog standard to decide on how they are suppose to look, something that the boxers don't follow by defult at all.
Boxers are lean, skinny dogs with a large "boxey" head. They are fast, but most of all, they are very agile.
Here is a pic of my boxer for comparason:
I thought I had a full body pic, but I guess I didn't... I'll try to get one tommorow
