It depends on the annual rainfall. In the east you may be able to maintaine a higher stocking rate than out west. Up here in Wisconsin you can run one pair per acre and cut hay to feed in the winter. The temps get so low here that it may require more hay to feed, the required 180 days, that you can't grow enough. We are in a period of over 31 days below freezing weather and that requires a lot of feed for the cattle. I doesn't get as cold as some parts but we have experenceed -18 this year and remained at below 0 for almost a week. That is cold, I don't care where you are located. Once it gets below 0 you can't tell the difference between -1 and -18.