Hello
Understand about mud! Are you talking about troughs, cratches or rings? Before they calved the cows were with the sheep sharing the cratches, but only the 4ft moveable ones and strip grazing the grass.
Now, the cows are strip grazing another field and also have a fixed 8 ft cratch getting lovingly messed up (more so on one side as the other side has a permanent track put down in the 80's!)
The sheep have been shut off the field they were grazing with the cattle and the cratches on that field (they'll go back on as and when they lamb, start watching them next week!) However, the field they are on has 3 cratches, 2 fixed and 1 mobile. They have 1 fixed cratch and the mobile in use. It's wet, though apart from some wasted fodder and poo, the cratches are fine. Little feet help.
The cows come in at night to their pens and their mats. I have mayo mattresses. Each one is lifted in the morning, cleaned and kept on its edge to dry whilst the floor dries slightly. Each pen cleaned daily.
I wouldn't use my mats out doors, but that's me.
Poaching is one of the problems most of us face. Just means the roller will be in use next year.