Kasey weighs 3 pounds. He's never had any medical problems, then again, he's still under 1 year old. (Mom was 5 1/2 lbs, dad was 5 lbs) He can jump on the couch, but we leave the recliner ends out so he can just "run up" on them.
He keeps up with the others just fine, but we all honestly feel like we have to tiptoe and whisper around him. You'd think he had fragile stamped on his head.
Such a sweety and a marvelous boy though!