That's because the surgery removes his testicles, where the hormone production occurs. It can take up to six weeks for the hormones to work their way out of the body, so if Spiffy is recently neutered, his behavior might still be influenced by residual hormones.
Most average cats and dogs take fourteen days for their incisions to heal. Side note: that's about how long it takes for people to heal, too. It's good to remember that if a person had a surgery like your pet just had, they would be restricted from activity for about a month!
The short answer is no, probably not. However, there are some exceptions to this. Sexual activity in sterilized cats could be related to a health issue. In addition, some cats display behaviors that are misinterpreted as sexual in nature when they are actually behavioral problems or even normal cat behaviors.
Do not allow your cat to lick or scratch at the incision, as there is a danger that the cat may pull out the stitches or may introduce an infection into the incision.
As we all know, neutering is very successful in cats at eliminating male-typical behaviors, curtailing most of these behaviors with something like 90 percent efficacy. Many of these male-typical behaviors disappear soon after neutering, though some may persist for weeks, months or even years.
Time Frame. According to Guide to a Healthy Cat (Elaine Wexler-Mitchell, 2003) male cats that have just been neutered will still be able to easily get erections for a few weeks after their operation. This is because it takes one month for testosterone to completely leave the cat's body.
Post Spay and Neuter Surgery Care: Most pets will stay at the hospital the night after they are spayed or neutered for observation. However, some pets may be allowed to go home that evening. Remember, your pet had a major surgery with anesthetic and they may be drowsy or may try to hide.
Neutered cats are also easier to get along with. They tend to more gentle and affectionate. Neutered males tend to roam less and typically are not involved in as many fights with other animals. Neutering keeps your pet healthier.
Spaying helps prevent uterine infections and breast tumors, which are malignant or cancerous in about 50 percent of dogs and 90 percent of cats. Spaying your pet before her first heat offers the best protection from these diseases. Neutering your male companion prevents testicular cancer and some prostate problems.
Unneutered males can become frustrated and aggressive, are more likely to become territorial by spraying around the house, and will fight any male that they may encounter. So yes when you have your cat spayed or neutered they calm down, become more relaxed, better pets, and their activity level will go down.