OMG, I remember you posted one time feeling bad that my BP was so small as it was so much smaller than yours. Patriot is now around 800g. Other than peeing and pooping, he seems to keep every gram ingested. Times when he acted particularly hungry, I'd notice a slight weight loss.
As for the OP, can't really answer that as we haven't had our BP for a full year yet. It has gained 700+g in 8 months so far.