I was told by my breeder that n+1 litter boxes is teh way to go. But I've decided as long as I have large litter boxes then its not a problem. I have 3 cats and 3 large litter boxes. They almost ignore one of them but its there if they want it. When I had one cat I only needed one litter box. He'd go outside for a while and then come in to go to the bathroom
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