And they will eat it if you make them get a little hungry to eat the rye. My cows love it until it gets so tall and heads out and then it gets more like straw. Different flavors to the different varieties but one of the things about rotational grazing, is for you to leave them long enough in a small enough space, that they eat and tromp down the taller grasses which makes more organic matter to break down into the soil. Maybe try to put them on the rye sooner?Haha, a little too much "silvo" and not enough "pasture" I had some nice rye grass growing in the shaded areas, but the sheep didn't want it. They wanted the grass growing under full sun. I deduced that the shaded grass didn't have the nutrients or taste of the more preferred sunny grass.