I have discovered that when I wean calves and I am running cattle through the chute I run the cull cows in with the weaned calves for a couple weeks. These are usually old cows, no calf and calm. The effect of the old cows is amazing. The calves start eating grain almost immediately, this is new to them. My cows never see grain but they seem to remember their heifer days. Also no tearing from one end of the lot to another. Also they seem to stop bawling sooner. For what it's worth, farmguy.