Seems fine to me. Dottie my little pied girl went from about 100g when I got her to 1000g in about 4 months or so. She also went from 12" to about 3'. She is a pig though and loves to eat. I've never seen an obese BP. They seem to self regulate their weight by going on fasts for months on end. Now boas, they get overweight at the drop of a hat if you let them.