Ah yes….I occasionally think Coco does things intentionally BECAUSE Jackson is here. She was our Alpha Bun (in so many ways) and she was always a bit on the Feisty side of the spectrum, she did increase the feisty with the addition of Jackson – almost in a “He’s got my back” kind of way.
The irony is that Jackson is NOT a naughty bun at all. The worst behavior I have seen is him grabbing a lush piece of dill from her mouth and foot flicking off under the bed. He also has always been 100% with his litter habits.
She remains my stray pooper – and on occasions when I have upset her, she will pee in very specific spots. Jackson Only poos outside the box when he smells her urine.
As to the hay…I am not sure you can convince them to not use the space with hay as a litterbox. It seems to be, in some way, hardwired into a rabbits brain ( or at least mine) Eat Hay….Pee and Poo. I use a Large Bottom “tray” from an old cage as a litter box – with two cat litter boxes set into it. This way I can clean their “primary” boxes easily and contain the mess from the hay within the box, somewhat. Also, if they overshoot the litterbox, then the edges of the box have litter in it and easily absorb the misses.
This way they have a really large space for their litter, they can both be IN the box and eating hay ( which I keep in the front space of the litter pans) and they rarely miss the litter (unless it is intentional) . I took a pic ages ago, let me see if I can find it….