My six year old has put on the most weight in this house, when I got him he was about 610 and now he is 650 which makes me pretty happy, he must like the hay I'm feeding better than what he used to get Baby Dragon is nine months old and weighs 550 and I really must get to weighing Sid again. He is not a fan of the scales whilst the other two just hop right on because they know they get a treat if they are good, although they usually both try to stand on it at the same time the second they see it, lol.