growing?

[Pookie]

I've owned my BRB since around feb. when i purchased her at the New England Reptlie Expo. She was said to be about a month old (around 6/7 months old now). Since i've had her i feed her about a pinky..now fuzzy once a week or so. She doesn't seem to be growing as fast as i expected. Compared to my ball python and cali king...she's still quite a bit like a baby! Is this normal or should i be feeding her more?