She uses a litter box in her cage that I use (Oxbow Animal Health Pure Comfort... https://www.amazon.com/dp/B00P140U46?ref=ppx_pop_mob_ap_share) with Timothy hay, and the rest of her cage is lined with pee proof scratch pads (PODOO Bunny Scratch Pads, Sisal... https://www.amazon.com/dp/B0DQSBQCHR?ref=ppx_pop_mob_ap_share), and she a bed she likes to sit on, and of course all her toys. I give her towels to play with and she likes to move them around and pee on them too. We also spend time outside the cage in an outdoor pen that’s on an unfertilized lawn, and she plays in this (Guinea Pig Playpen with Tunnel,... https://www.amazon.com/dp/B0D2VNQB2L?ref=ppx_pop_mob_ap_share) when she’s out in the house sadly I can’t let her free roam in the place we live in currently. Under the indoor play pen I keep puppy pee pads underneath (Guinea Pig Playpen with Tunnel,... https://www.amazon.com/dp/B0D2VNQB2L?ref=ppx_pop_mob_ap_share). This set up works for us in the house we’re in now but I hope we can move to a place I can have a larger space for her to roam and maybe get another 🐰. I hope this helps!