I have to think about this bc I have had up to 5 cats using litter but they are indoor outdoor.
I have a friend that swears by pine pellets, I’ve never noticed an odor but I likely wouldn’t, and it’s messy as heck. She dumps the whole thing into the compost waste, and she’s very vague about how often she does it. She has one tray, next to the door from the kitchen to the garage, for two indoor outdoor cats.
I have five trays, two in each bathroom, the master is oversized so there’s space and we don’t use the tub in the guest bath so that’s where they go, and one in the mud room, I use tidy cat clumping mixed with tidy cat non clump in the 50 lb sacks from TSC, and I get two to four weeks before I have to dump, scrub or swap out the tray and refill my daily scooped litter. It says two weeks’ odor control on the packaging.
With three current cats I can really stretch it having five trays.
I totally go by cost so if the milk jug type containers are less per ounce I buy those versus the buckets and try to track sales. I just like the 24/7 red label tidy cat brand, hubby has brought home all the cheap stuff at one time or another and since I’m the one that hears about the smell or mess and has to clean them I prefer that brand.
I get more odor if I don’t take the bag of scooped waste straight outside. leaving it inside every time I open the can lid I get a whiff, so it either goes in the guest bath trash can with the pedal lid that I am just using for waste till trash day or I make the trip outside.
I’ve tried using baking soda when I was working and not scooping daily, scooping every day is more consistent. I also bought multiple trays, the smell seems to get into plastic so I scrub or rotate trays and now with five for three cats that’s not a big deal.
I’d say it’s more costly to start and not a space saver but the time savings of multiple trays vs frequent dumping and refilling of one or two is quite nice!