Why is my neutered cat grumpy and hissing at other cats?
Thanks for using Petco Pet Education Center, formerly Petcoach! On the whole, I’m not worried about this yet. It can take a couple weeks to feel completely normal after a neuter, especially in adult males. If you have pain medication still, go ahead and give it as even mild pain can cause some cats to be a little crankier than usual.
Sometimes, a long trip to the vet or anesthesia seems to disturb cat relations and anxiety is more of a problem.
If this behavior is not improving with pain medication, or persists for another week or more, consider these anxiety-reducing home helps.
-Feliway- calming cat pheromone- comes in many forms from pet stores or online.
- Adding a litter box. Studies show that the ideal number of litter boxes for a home is #of cats +1 . This is regardless of how clean you keep his current litter box.
-making sure he has plenty of “high space”. The safest (and therefore least anxiety-inducing) place for a cat is up. If you don’t already, get a cat tree or put up a shelf or two that he can go perch on.
Best wishes to you and Gus!
Updated on September 23rd, 2025