Hello, its been awhile since i read the posts on this site. I have a question about weight loss. Maximus is now 15 months old. In the February i weighed Maximus and he was 160 lbs, yesterday i weighed him and he lost weight, he is now 150 lbs. He has gotten taller and is by no means skinny. Would the summer heat have anything to do with it? or the growth spurt maybe?