Still not the fattest, so don't worry! My Molly should be around 22#, and she's ranging from 39 to 41. Last weigh in was 41. That's all because I live with my mother, who free-ranges hers, and won't separate them. Luckily, we'll be moving out soon, where Molly will have no choice but to eat just what I give her! 

OMG thats one round sheltie!!!!!!! I think shelties are naturally missing that im full sensor to stop eating! I think every sheltie out there would be a ball of rolling fluff if left to their own devices!!!!!!