Your pasture differs from mine and from his. You have to find out this stuff. One of our fields has a fairly poor but exceptionally hard-wearing and drought resistant sward. Another has been re-seeded, limed and fertilised and is growing well. That's where the sheep are at the moment but we will move them onto the first mentioned grass to give their poo and worms a chance to disperse.
When the sheep have been on the new grazing for a while we'll move them elsewhere and put the horses on to what will by then be fairly poor grazing. I what the lambs to fatten, not the horses.
Every time we move the animals we plan where the next move will be to so we aren't caught out.
I have electric fence tape on reels which gives me lots of flexibility with planning the grazing.