We are having a problem with a calf on a cow that seems to have adequate milk - good sized bag anyway. The problem is that the calf doesn't seem to thrive. It's about 5 days old, so I brought it in a couple of days ago and it sucks the bottle right down and perks up. I take it out for the day - mom accepts, it sucks for a while, but droops again later on. I checked my records and she lost her calf last year. My question - is it possible to have a cow that isn't able to provide adequate nutrition because of poor milk quality?