He just sounds good and healthy to me!!!!!
My little guy is big too- he turned 9 weeks yesterday and is 14 pounds 5 oz. I'm exclusively breastfeeding too-we don't even own a bottle- so I say they are just fine. Jett is in the 90th percentile but my doc. said not to change a thing! Hope you are doing well! Our Nov. 08 Mommy board seems to have fallen apart!