Medical Reasons for Inappropriate Urination. If your well-trained cat suddenly starts peeing in random places, a visit to the vet is the first thing to do. Your cat could have a urinary tract infection (UTI), which is very common. An infection will cause him pain and he'll refuse to use his litter box.
Then, why would a neutered cat start spraying?
However, spraying can even occur with neutered males and spayed females, especially if you have waited to neuter a male cat after he has reached sexual maturity, by then, spraying may have become a fixed habit with him. Your cats may spray urine to mark their territory when they feel stressed.
How long does it take for a cat to stop spraying after being neutered?
Cat spraying is a common problem and in most cases may be stopped by neutering the cat. Typically, over 90% of cats stop spraying within 6 months after the neutering procedure. However, even neutered cats may spray; typically this is due to a medical condition or stress.
Why is my cat starting to spray in the house?
Cats also mark their indoor territory by rubbing, scratching and bunting. Most pet cats are neutered and do not spray indoors, probably because they do not feel the need to. Spraying indoors is a sign that the cat is feeling stressed and is trying to feel more secure by surrounding themselves with their own scent.