So what I'M reading it doesn't matter the size of bag. Its wheather the bag is I would say firm or tight to the cow. Would be a better nurser for the calf. I had always thought the bigger the bag the more milk and better calf. Is this correct. So there wouldn't be a problem if the cows bag is small but tight the calf would be getting plenty of milk. I can see the problems with bigger teats as I had a cow with teats so large the calf couldn't suck. had to bottle feed that calf and the cow went to the sale barn.