Brookman, I am in sw missouri, so probably not too far from you. On the average, I figure with my fescue pasture I will have to full feed 110 days. Jan 1-April 10. The best 5x6 grass bales I have ever fed would feed 50 cows 1 day. The worst would feed 25 cows 1 day. Normally, I would say you should count on 1 5x6 bale feeding 35 cows one day. So, you should figure 1 bale will last your cattle 3 1/2 days. Figuring 110 days that will be 32 bales, plus you will probably need another 5 to keep before them while they are finishing up the grass in December. If you figure 37 bales, you will probably have hay left over. If the bales are 4x6, figure 1/4 more and if they are 4x5, figure almost double. So, if they are good 5x6 bales, you can figure it will take 3 1/2 bales per cow-calf pair for the winter in a normal year---if you dont have grass until the first of jan., add 1 bale per month per cow