We calve in May. The last few years we've put our first hay to the cows around the 25th of November, and they are fed through to the end of April. I got behind with a busy fall, but I'm going to go out today and tomorrow and set up our bale grazing. There is some stockpiled grass under the snow in the field I'm going to set the bales out in, so that may stretch our supplies. We have tons of hay, so I'm not worried, but if we can cut less and graze more next year that would be super.
I figure 11 x 800 lb round bales per cow every year. That is usually high, but it gives us some room to breathe. Hay prices bounce around, but for dry cow hay we can usually get acceptable quality for $25/bale. So you're looking at $200-$250 a cow if it's a tough hay year. We would love to graze more, but we get so much snow in our part of Ontario that getting all of your stockpiled grass can be tough. The other thing we contend with in Oct, Nov, and the early spring is mud. It seems like a bit of pugging in a MIG scheme doesn't hurt the ground (might even help it) but if we're half a day late moving the cows on they can do a pile of damage.