Jasper is a 3.5 pound rex boy. He's on the busy side and has lots of energy to burn. Of course, he was born in January 2009, so that's to be expected at this time of his life. He'll be settling down a little bit more as he matures. He can also be a little bossy, but we're seeing some improvement in this since his neuter. Still, he might not be the best choice for younger children; we'll be happy to discuss this further with you if you're interested in this fellow.