Sooooooo I was wondering if anyone has had success with NOT putting the hay in the litter boxes? Each of my buns has 2 litter trays. They each have 1 by the gate barrier that separates them, and 1 in their favorite “toilet corner” 

The litter trays by the gate have hay in them. The litter trays in the corner never have hay in them. They still do poops and pees in the box without hay. I mean they REALLY seem to know where to go! I have had pee where it wasn’t supposed to be was the first time I switched them into each others area. So I am attributing that to territorial business. (And it was only Ophelia, he hasn’t peed on anything that I know of). So I have had a running experiment the past few days. Since Quincy was just neutered I got out the small litter box that I started with, which is a ferret box I think? anyway, he doesn’t have to jump to get in it because one side is cut down so he can just hop in. Since that box is quite small, I didn’t feel like he could comfortably eat in it. So I put his hay on a plate on the ground outside of the box. He has been eating the hay outside, and still going into his box to poop and pee! Could this be? Could it last? Could I have finally found a solution to the wasting of pee soaked hay? I have only had him leave the occasional stray poop near the plate, which I can totally live with picking up one or two poops. Has anyone had success with buns still using the litter trays with having the hay elsewhere?
He is two days post neuter. I have seen people say that they may lose control of litter habits right before or after, but I haven’t had any problems with him at all. And I am honestly so surprised that he’s been so good the past two days considering his circumstances. I’ve watched him. He will eat off the plate (of course push everything on to the ground so I have to put it back on the plate lol) then he will stop, turn around, hop in the box, lift and pee, then back to the plate to eat.