I do some part time work for a family that owns a 230 acre cattle spread. They rent out a 5 acre pasture to a man that raises meat birds. The cattle owner turned about half of his herd into that pasture because grass is getting scarce. The cattle tore up the chicken pens to get at the feed.
If you keep livestock, keep the stock securely separated from your birds!

If you keep livestock, keep the stock securely separated from your birds!