I just bought a kitchen scale to weigh my bp and I want to see if it is average weight or if I am doing something wrong. She is about 21 inches long and 4 inches around and the scale says 279g. She is about 6 or 7 months old. She is eating rat pups but they seem way too small, she swallows them down real fast, I got a few small adults that are about 4 inches around (just like her). I feed every 5-7 days.

Does this sound right or am I doing something wrong?