Kay, I guess, like humans, their body structures and weights differ. How lucky she is to be able to eat tons and look so fabulous! Believe me, it's so tough to put a dog on a diet! Klo gained 8 pounds since I got her, but unlike Cody, isn't interested in food, she just matured. As long as Ki is healthy, i wouldn't give it a second thought. She gets a lot of excercise don't forget! All your dogs look great!