My normal, Matilda, is right at 160 g and eats one large mouse per week. I can't imagine trying to feed her a rat at this point. I honestly would think that you are feeding yours just fine. I know my other bp is only 70g and we have been feeding him every 5 days. You can try that if you think your bp is too thin.
Rats don't just come in one size...a weaned rat is about the same size as a large mouse....hatchling bp's can be started on rats (pups)...people usually just start them out on mice because they hop around and apparently are more appetizing...
Lucifer Sam, Siam cat...
Always sitting by your side,
Always by your side...
That cat's something I can't explain...