Is my Dog too Skinny? Does my baby need to lay off the treats?

I see many questions about whether a boxer looks too fat or too skinny. Purina gives a body score chart that I believe is a great reference.

Boxers are often a little leaner as they are highly energetic, however hip bones should not be drastically sticking out and ribs should not be protruding. Also remember that excess weight, like humans, is hard on and unhealthy for the joints of the dog.