What behavioral changes can I expect after neutering my tomcat?

Initially probably you won't see much changes, at least for the first few months. Slowly attitude may change towards less markings and other male-sexually related activities (aggression, escaping looking for females and so on). Most of the times these changes influence positively their life in my opinion.

Neutering will keep him from roaming as much although if he continues to go outside he may still fight with other cats. The urine marking in the house may stop but there is no guarantee as he is already older. If they are neutered young (like less than 6 months of age) then that behaviour is virtually non-existent. So, to answer your question......maybe some of the bad behaviours will stop but there is no guarantee. Regardless, it is better to have him neutered and I highly recommend it.

Hi. Yes, neutering will help Toby want to stay home more and hopefully make him less likely to fight. It can take a couple of months after the surgery for his testosterone levels to completely drop but neutering typically does resolve a lot of male to male aggression in cats.

It certainly might. Urine marking is a normal and expected behavior for intact males, so neutering is one of the first things we recommend if your cat is doing this. The earlier it's done, the better - this is because the longer this behavior continues, the more it will become a habit that may not resolve after the neuter. It's important to realize that urine marking can also be related to stress or anxiety, so if this is the case, these issues would also need to be addressed in order to resolve the behavior.

You should have him checked, or rechecked, by your veterinarian. Neutering typically does not result in more aggressive behavior. Additionally, any sudden behavioral change can be due to illness or injury. Once medical causes have been ruled out, you can focus on behavioral issues. Consider a pheromone product, such as Feliway Spray or plug in diffusers, to help decrease anxiety or aggression. Provide additional litterboxes, bowls, toys and bedding to prevent resource protection. You may have to separate them for a week or two then gradually reintroduce them while employing the measures described above.

Thank you for your question about Tyga. If this is a male cat getting neutered (not sure if that is what you mean, or if in the UK they call both procedures being spayed) then it should not cause him to be any less loving. In most cases it will help calm and settle a male cat who otherwise as he matures would be more likely to want to roam or be aggressive.

Neutering male cats is one of the most effective ways of limiting inter-cat aggression. There are no guarantees, but castration is definitely the first and best thing worth trying. If you are worried about the two cats hurting one another, I would keep them separated for the time being. Even after the castration there will still be some residual hormones left in the body for a short while. I would consider keeping the two separated for at least a week or two post-operatively before reintroduction. Hope this makes sense.