The sheep know that the grass is turning green. I’m not sure how. Maybe they can smell it.
But we’ve closed off the gates to the north and south pastures to let it grow. If we let them at it now, because the ground is so wet, they’d pull the grass up by its roots. So we let them graze in the back pasture where the ground is higher and drier and there’s plenty for them to nibble on.
It’s been getting warmer and raining a lot so soon the grass will be long enough for the sheep and donkeys to graze on. Then we’ll stop feeding them hay and they will be very happy.