Hi mumsnet, probably just new mum over thinking everything but my newborn (13 days old) is bottle feeding and we're having to top up her 4oz feeds (every 3-4 hours) with another 2oz in between feeds. She was born at 37 weeks and weighed only 5lb 5oz but by day 10 weighed 5lb 15oz. I know I should be happy that she's feeding so well and gaining so much weight but can't help but wonder if there's ever a TOO much feed level? Still waiting on results of her hyperthyroidism blood test - my dad had it and was diagnosed a few months after birth (not routine blood test back then where he was like it is now) and has been on thyroxine for 56 years now. Going to call up tomorrow to chase down results. Don't think its cluster feeding either as sometimes she'll sleep for 5 and a half hours and then wake up demanding 5-6oz till her belly is swollen. Regular wet and heavy nappies within the standards. Also if it is relevant she started out on the preemie teats in the hospital and is now on the medium flow teats as midwives felt she was tiring herself out on newborn teats when we first came home. She was jaundiced and on solartherapy beds a few days after birth but believe this was consistent with her early arrival and low birth weight. Is it normal for her to be feeding so much? Anybody whose baby had hyperthyroidism and what their symptoms were?