Hi, I hope someone can help. We have two rabbits, both desexed. Donovan is approx 7.5 years old and has always used his litter box well. Ella 1.5 years old and was bonded to him 8 months ago. Since getting her she has never used the box well, but both now are very messy outside of their box. We have tried all of the relevant suggestions (they are desexed, moving their box to where they most often go, having multiple boxes in their space, restricting their space, adding old pellets to the new clean litter box, etc.) and nothing helps. (And they can both hop in and out of the box(es) quite easily). Their hay is just beside their main box and they often go right in the litter box, but they will also pee and poop just outside of it. Their area of peeing and pooping outside of the box is now ever widening within their space. They have also recently started drinking excessive amounts of water. As their bad habits have gone on for so long with no improvement with all the interventions, I am wondering if there is something physiological going on. Any suggestions are most welcome.