My little Chassis is 2.6 lbs, and she will be 2 in December, she has the soft spot on her head, so I really worry about things that could drop on her. It wouldn't take much to hurt her, a remote control for the tv to fall, or anything. The small one's are sure cute, but there is so much to worry about with them.. When I found out that her soft spot wasn't going to close, I told my husband, Chassis needs a little helmet !