I Have 4 cats, one died recently.. The youngest is 3, then 4, 5, and 5.. We have 3 litter boxes but one or more cats keep peeing on the floor. Me and my best friend go to the store to find stuff to clean the pee. It smells so bad i am embarrassed to have anyone over! What do i do? None of them have UTI. Only the one who passes recently did. She was 24 so it was age. But I want to know who is doing. We have been switching cat litter and i just can't stop it. All cats are fixed except one but she doesn't pee on the ground... Please help me! Thank you!