Ten week old not eating much.

Brandy
I keep reading how other babies my girls age are eating 4 and 5 ounces at a time but my Piper does good to eat 2.5 every 3 hours or so. She has an ungodly amount of wet diapers everyday. The only time she doesn't have a wet diaper is between her bedtime and midnight feeding. She won't wet her diaper until her early morning feeding. She poops usually at least once a day but often will skip a day. Her ped says that she's growing nicely along the curve but I can't help wondering if she should be eating more. She weighed 9lb 7oz at her 2 month check up. Are there any other mamas out there whose baby doesn't eat much?