bps grow at different rates, so if your guy is gainning wieght and eatting i wouldnt worry much about it. i know thats hard, i keep records of wieght gain LOL. I got My BP last June and he wieghed 57 g, so i am guessing he was at least a month old. I just wieghed him today after a BM and he wieghed 720 g. thats a lot more than your year old BP but they are 2 different BP's. From what i have found on this site, some people have Bp's that grow at a more rapid rate than others.