It is funny how some are jumpers and others are not. Ben and Sadie were not really jumpers. Ben does not seem to be able to jump very well. Not sure if it is all of his hair or what. Sadie was never a jumper and I know she could have been, she was just a little quiet, lady-like doll. Rocky, however, will jump on, off of, or over anything. He scares me to death with his antics. It's like you are a little proud that he can do it, but scared that he will do it when no one is around and hurt himself. So, we are working hard on training him NOT to be such a jumper. I do still let him jump up in the air -- he has a lot of fun doing that for treats. I think he feels he can out-jump the other dogs and get their treats too.