Duke 3 years - 61 lbs, Abby 6 years - 69 lbs, Jack 2 years - 80 lbs, Molly 3 years - 46 lbs. Duke is my skinny boy. He eats like a pig but is always on the go. The doc says he's a little ribby but he looks great so I don't worry. Abby is getting older, slowing down, putting on a few pounds, Jack is a house...he feels like he weighs a TON and Molly is just little all over...she's my little tank.