Then one of the sheep did an amazing thing: it lay down and rolled it's body over the cattle grid, then stood at the other side staring at the rest of the group. They didn't follow, and eventually drifted away.
I've never seen or heard of that happening before or since. I sometimes wonder if that sheep was some kind of once-in-a-generation freak: a kind of Leonardo da Vinci outlier.
I like sheep.