Depends. How often you feed him/her..I feed my smaller BPs every 5 days up to 300 grams and then put them on a 7 day schedule. It also depends on the BP itself. I have two 09 females that are around the same age but one is 200 or so grams larger than the other. In the winter months mine have also went off feed for several months at a time. So alot can factor into their growth.