6 to 7 bales per cow is what I been told to get through winter. I have just under 120 and we have been using 130 bales a month but it's been a really warm winter so that number could vary depending where you are from
I don't think it's going to be a late spring and right now I have 10 bales per cow because I bought way to much hay
Is it bad to over feed with hay because I don't want any to get rotten come spring and I'm going to have some extra bales that I'll want to use up?
You can't overfeed hay. When they are full.they will stop eating. I use about 7 heavy round bales,5x5s, per 1000 pound cow.