I kept one litter tray for my two cats just to save space in the flat: the morning I found the damp patch on the duvet, it had nothing to do with spite
That mysterious damp patch on your duvet isn’t feline revenge—it’s a cry for help from an inflamed bladder. When two cats share one litter tray in a small space, the stress can trigger Feline Idiopathic Cystitis, a serious condition that mimics bad behavior but requires immediate veterinary attention.