Litter setup for new kitten with adult cat

You're thinking ahead here, which is exactly right — litter territory is one of the most common friction points when a kitten joins a home with an adult cat. Before we get into self-cleaning options, I want to give you a quick honest picture: these boxes genuinely reduce daily scooping and keep things fresher, which helps a lot with cats who start avoiding a box that smells like a rival. The downsides are cost, needing clumping litter, and some cats taking time to accept the mechanism. But for a two-cat setup you're building from scratch, they can be a smart foundation. To point you in the right direction — how old is your adult cat, and do you know whether they're already confident and relaxed about the litter box, or do they have any history of being fussy about it?

That's a good position to be in — a relaxed adult cat is much more likely to accept a new box style without drama. With a kitten coming in at eight weeks, the standard advice is one litter box per cat plus one extra, so ideally three boxes. Is this mainly about making your life easier with less scooping, or is the core goal really about keeping the two cats from competing over litter space?

That makes complete sense, and it shapes the recommendation. For your situation — proactive setup, two cats, primary goal being territorial harmony — I'd suggest one self-cleaning box for your adult cat as her established, private space, and one or two standard open trays in separate locations for the kitten while it settles in. The kitten shouldn't start on a self-cleaning box; the noise and movement can be genuinely frightening at eight weeks and could put them off entirely. What's your rough budget for the self-cleaning unit?

That budget works well. My recommendation is the PETLIBRO Granule Self-Cleaning Litter Box — it sits comfortably under £150 on Amazon UK, uses a rotating drum rather than a rake, which means it's quieter and less likely to unsettle your adult cat during the transition. It works with any clumping litter, the waste drawer is well-sealed so odour is genuinely controlled, and the footprint is manageable. Give this to your adult cat as her established box, put it where her current tray lives now so the location feels familiar, and set up two simple open trays in different spots for the kitten. Once the kitten is around six months and past the startled-by-everything phase, you can reassess whether you want a second self-cleaning unit. That setup gives each cat clear, separate spaces from day one.

Set it all up before the kitten arrives — ideally a few days before. You want your adult cat to have already investigated the new self-cleaning box and accepted it as hers before there's a kitten scent in the house. If she discovers a strange new box and a strange new kitten on the same day, that's two stressors at once. Get the PETLIBRO running, let her use it a couple of times, then bring the kitten home into a separate room with her own trays. Slow introduction from there.