Warm season grasses (big and little bluestem and side oats grama) are supposed to be really palatable and great summer grazing. Ours right now is growing well and is around 18" to 24" tall. Last year we baled it and the cows wouldn;t eat it over the winter, picked at it and prefered gleaning anything else they could find to eat. Turned them into the WSG this year for grazing, yesterday they pushed through a rickety section of old barbed wire fence to get into the headed out field of mixed orchard grass and fescue that was 3 foot tall and really rank. If this WSG is supposed to be cow candy why do they prefer the old crappy fescue stuff? A couple of years ago we had the same thing when we turned them into a lespedeza field, the idiots almost starved cause they wouldn;t eat it.