Our baby lost 13% of his birth weight at the hospital, probably because we didn't know what we were doing with feeding. We got lots of info, changed our ways, and ended up with a baby who gained 5oz over a 3 day period of going to the doctor each day starting right after coming back from the hospital. We felt better.
Fast forward to out 2 wk (12 day) check-in. We kept up all of the same habits. Baby lost 2 oz. He is still 8 oz below his birth weight. We were so surprised.
This is what I don't get. We have had 8 feedings minimum a day, usually 10. He has never had fewer than 6 wet diapers, usually 9ish. He has never had fewer than 4 poop diapers, usually 6ish. Anyone else hit all of the stats but has a weight gain problem? What did the doctors say? They told us to supplement breast with bottle (expressed milk--I have extra due to pumping and leaking). We'll see if that works. What did you hear? I am especially curious about the fact that the diapers fit guidelines.
One thing we know is bad about his eating is that he is super slow/tired/lazy. So feedings take a while. But that doesn't explain the wet & poop diapers.
ETA: I am breastfeeding; bottles are just supplement and are also all breast milk.