What to do if my 4-month-old foster kitten won't use the litter box?
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This is a hard one. You have tried a lot. Mentally challenged cats use the box, so I don't think we can blame that. I think this is a behavioral problem or preference to this particular kitten. I would crate him 100% of the time with minimal bedding (1 think towel to lay on), his food/water and a box. He should stay in there until you find a substrate he will go on IN the litter box: astro turf, piece of carpet, empty box, newspaper, etc. I wouldn't allow him to go all over your house. Put his urine and poop in the box with him. Show him how to dig around in the box and cover it up. He should be confined until he has used the box for 2 weeks then can be let out under supervision only. Once you see him use the box consistently can he be out with out supervision. All soiled areas must be cleaned with an enzymatic pet cleaner and if you can block access to as many rooms as possible that would prevent him from wandering off privately.
I really wish you the best, this is not going to be easy.
Updated on September 23rd, 2025