I joke that mine need snorkels to find any grass, we move the cratch every day and the field now has odd stripes of mud and dropped hay. They are prone to foot problems I carry the blue spray and get them at the cratch, if not better in two days they come up to the top field for more attention, luckily most of mine follow if I have a bit of cake in my hand.
They are in two batches based on date of lambing and twins/triplets nearer the house, they will come up at the end of the month so fingers crossed about the feet. I put a row of lime at the entrance to their barn so they self treat a bit.