Hello everyone,
I’ve been having this problem on and off now. My other buns are fine when it comes to using the litterbox. However, I always have this one rabbit that fluctuate with her litter habits. To answer a future question, yes, she has been spayed (3 years ago). She used to be really consistent and clean with it comes to her litterbox habits (pooping + peeing in the litter box).
Once in a while, she will start spraying and peeing EVERYWHERE, then it’ll go back to normal again. It’s been three months straight now that she has been peeing where she sleeps, all over the floor, and I even found pee sprayed everywhere on the wall near the rabbits’ cage. What’s going on? Now, one of the other rabbit (this one is spayed too) is starting to pee everywhere as well. And usually, this is the cleanest rabbit – I’ve never had any litterbox problems with her. My other rabbits are having to deal with the consistent pee-drenched floor of their cage, even with cleaning their home two times a day!
Does anyone know what could be the cause of this? Anyway to solve this problem? 
Thanks!