I second that on the poops…Tucker is litter trained as far as peeing but he poops all over to mark..he’ll be getting neutered soon though so I am hoping to see that diminish with that. If they are peeing though….maybe it’s because there is bedding on the cage floor? It might be hard for them to distinguish between the bedding they should pee/poop on and the bedding that they play/sit/nap on. I put a washable carpet on the floor of Tucker’s cage. I vacuum it nightly (or if I am lazy or exhausted every other day) and it’s been almost two weeks now and I haven’t had to wash it yet. I will probably wash it next weekend. Since doing this I have seen that Tucker uses his litter boxes for pee consistently and for alot of his poops..and like I said I am hoping that neutering helps with the remainder of that.
Another thing to try…depending on how big the cage is …maybe more then one box is needed? I gave Tucker two, one on his top floor and one on the bottom floor. I also put in a basket of hay which he decided was an awesome third litter box so I need to now actually buy a new litter box for a total of THREE in his cage…which is only for one bunny..sheesh..but it does help to keep things clean!!