The Original Kiwi
This is our Jack Russell. He is about 12 lbs and about a 10 inches or so at the shoulder, but man can he jump. This is a pic of him jumping trying to get the birds on our roof. He did this from a standing position. When he runs, he can get his nose almost to the top of our 5 foot fence in the backyard (that's usually when he's chasing after cats).