I have to agree with Karen, I don't think theres any Boxer in him. I could be wrong though....but I have Boxers and don't see it, even though the face has a little bit of a Boxer shape.

His back half looks just like a Chow I had years ago. I do see border in him. He could be a mix of more then two breeds. border/st. B./ chow. Who knows.....but he's a cutie.