Ivan my Siberian is a model cat mostly. There one thing that rankles me, as male Siberian he supposed to be at least 15 lbs and larger. But he's only 12 lbs (max) and medium sized. He's five years old now. I know it's my fault I didn't feed him enough, but he doesn't eat a lot, he enjoys slowly nibbling on food through out the day. I wish there was some ethical way of making him bigger but not fatter. Stupid huh?