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Why is my neutered cat spraying and humping? Is he really neutered?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 2 years and 8 months old

Hi! I adopted a cat from a shelter (will be 3 years old in July). He is neutered. But some things make me doubt. These days as spring is coming I often feel a strong unpleasant odor ( similar to smell of cat urine, but stronger) in some unexpected areas. Also he saddles a pillow and walk around it like it's a female cat. We also have a female cat at home, which is spayed. It looks like he tries to come up to her and mate. So may he be not neutered or maybe he was neutered in a wrong way? Thanks!

1 Answer

Most Helpful Answer

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Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH

Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner

Published on March 27th, 2018

Male cats that are neutered after they reach sexual maturity are more likely to continue to exhibit behaviors that were caused by testosterone even after they are neutered. These behaviors can include urine marking and humping types of behaviors. That is one of the reasons that we recommend neutering before sexual maturity. If the shelter neutered him before you adopted him, then I would not doubt that he is neutered, but you certainly can have your veterinarian examine him just to be on the safe side. Cats that have testosterone in their system will have physical characteristics that your veterinarian will be able to determine on exam. Good luck! I hope that was helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

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