Toto is almost 19 months and weighs 4 lb. 0.14 oz. She is still about 1 lb overweight [a little porker!]. She is on a diet and so far has lost about 7 oz. Her little frame is small and she doesn't need to weigh over about 3 lbs. It's not too bad for her now but as she gets older is will be tough on her little heart and knees!