Our Galloway calved nearly a month ago. Mom and calf appear to be doing fine, however over the past two weeks, the cows udder size has decreased tremendously. Seems like in other cows I have seen, milk production seems to increase for a few months, and appear to have a very heavy bag. It almost appears she seems to be drying up, as her udder is not much bigger than our heifer. This is her third calf. The calf is energetic, so I am not too worried, but is this unusual?