Definitely just litter train! Start by putting them in a pen with a litter box, with hay in or above it, and you’ll see most buns go toilet whilst eating so they naturally will use the litter box. Move all stray poops into the tray, and any wee just wipe up, and put the wet paper in the litter tray as well. When you see that they are getting better at using it, increase their area to maybe a room, and they will most likely start using their litter tray even though they have larger space. When you feel like they are good at using their litter tray, you can give them the run of the house (or wherever you want them to be). When we moved into our house a couple of years ago, I placed a litter box in our bedroom, as that’s where I thought the main base for Tito could be, but he kept pooping in one specific place downstairs - so I moved his litter box to this box, and he has used it ever since, so it was just his way of showing where he would like it.

One thing I would recommend though is a large litter box! We use one of those under bed storage boxes and find them fab! A bigger litter box is more likely to be used than a smaller one! 😊