Thanks for your responses. Re hay racks I also tried an unusual one: think of a hanging basket but a half one, so it’s like a half �� moon. It worked quite well but I’d bought one that wouldn’t hold a full day’s supply of hay.
However now I’ve got storage boxes I’m much happier to use them .I’ve started putting more hay on top of existing hay in the box when it gets damp. I put fresh hay on the bricks and around the inside the box (these act as steps for Harriet)
They don’t seem to use a particular, or set area, in the box for pee etc but with the added hay I now change it with the clean box every other day.