They're standing in knee deep grass, eating to their heart's content.
This also makes less work for Kris, since he doesn't have to feed all of them the chopped up food from the feed pile. (He's still feeding the milk cows a supplemental feed, and feeding the one-year-old calves, and feeding the new baby calves - but still, a little less!)
Have you ever seen cattle go out on pasture? They're always so excited. They frolic. They kick up their heels. They check out the fence line to see how far they can go. They eat and eat. When it's quiet, you can hear them tearing off the plants and chewing. It's not a setting on any sound machine I know of, but it's just as peaceful as hearing waves crash on the sand.