Even after being neutered, the male may become stimulated enough to try to mount a nearby female cat in heat due to her scent. A neutered male can even display mounting behavior toward a spayed female.
It sounds like you are concerned about the intact (unneutered) tomcat trying to mate with your spayed cat. To answer your question – no, your cat is not at any risk. Intact male cats are attracted to females because they are “in heat.” A spayed female cat won't be in heat and won't be receptive to mating.
Neutered male cats hump other cats (and even inanimate objects) because of UTIs, stress, and a variety of other health and behavioral reasons. This can result in stress for both you and the second cat, as the second cat may not want to be stalked and mounted.
Without the drive to mate, your cat may be quieter and won't be prone to cat calls and the incessant need to seek out a mate. The spayed pet no longer attracts males and their annoying advances and serenades. Spayed cats are also easier to get along with.
Please don't. They will both get hurt and there are so many reasons and resources for easily neutering/spaying (altering) them first. It is hormonally driven; they can't help it because they will generate sex hormones until you have your vet alter them.
Neutering stops most unwanted cat behaviors, like mounting, humping, and spraying. However, it can take up to 12 weeks for the hormones to leave your cat's body completely. If your cat was recently fixed and he's still humping, don't worry—he'll most likely stop after a couple of months. He was neutered at an old age.
When your cat is spayed, the entire reproductive tract (including both ovaries and the uterus) is surgically removed. Therefore, your spayed cat no longer has ovaries, produces estrogen, or goes into heat.
Gender. Male (neutered) cats are generally believed to be more accepting of other cats, both male and female. Even though this has not been my experience, female cats may not get along as well with each other.
it's a form of sexual aggression. Cats mate by the male biting the female behind her neck and holding her in position for copulation.
Cat humping is a natural thing, and it occurs for many reasons, the most important of which is hormones. Intact male cats will hump female cats as part of the sex act. They may also hump other male cats in the home, which is viewed by most experts as dominance behavior.
Some of the underlying non-medical causes for aggression between cats in the same household include fear, lack of socialisation, inappropriate introduction of a new cat, overcrowding (i.e. not enough vertical or horizontal space, too few resources etc), redirected aggression, play and predation.
Quarantine Entire Male Cats
VetInfo explains that apart from neutering, quarantine is the most effective way of preventing mating from occurring. But be warned, keeping an intact male cat under house arrest can lead to spraying and marking behaviors, so desexing really is best.
Cats that are bonded sometimes show sweet displays of affection toward each other, like grooming. They'll lick and bite each other, clean the other's fur, and spend a lot of time making sure the other cat is purrrfectly clean. This type of grooming is a good sign—it means your cats are friends.
Male cats tend to be more social and affectionate with both humans and other cats. They commonly form strong bonds with other cats in the home, even when they are not from the same litter. Females, on the other hand, are often more standoffish. If you are looking for a cuddle bug, adopting a male may be your best bet.
If you have multiple cats, they may be comfortable enough with each other to share the same litter box. However, there are several reasons, including territorial behavior, why some experts would advise at least one extra litter box in your home.
Depending on where your cat spends his time, he may view your whole neighborhood as his territory. Female cats can be just as territorial as males. The behavior patterns in this type of aggression include chasing and ambushing the intruder, as well as hissing and swatting when contact occurs.
If a spayed cat shows signs of heat, it is possible that there is ovarian tissue still in the body and producing estrogen. This can happen for a few different reasons. In rare cases, a small piece of ovarian tissue could be left behind during surgery, allowing continued secretion of estrogen and signs of heat.
Without ovaries, she should be unable to come into heat. Occasionally, a remnant of ovarian tissue is mistakenly left behind. This tissue can lead to some annoying behaviors as the cat comes into heat (though she would be unable to get pregnant if her uterus has been removed, as is customary with spaying).
Do spayed cats still go into heat? Once a female cat is spayed, she will no longer produce estrogen or have ovaries, which means she will no longer go into heat. While there may be some rare cases where remnants of ovarian tissue remain, causing some heat-like symptoms, this is not typical for a spayed cat.
It's normal and natural for a male cat to enjoy the sexual pleasure he may experience from this activity. Some cats that hump are insecure or need extra affection. Trauma or surgery can cause humping. If your cat is bored, frustrated, or feeling too confined.
Spraying often starts around six months of age as cats reach sexual maturity.
Locating a Mate
Female cats in heat (in the estrus cycle) exude a powerful sex pheromone that can be sniffed or "scented" by a male even at a distance of a mile away.
What About Male Cats? Male cats don't have heats. However, if unneutered, they reach sexual maturity around the same age as their female counterparts — as early as four months, but usually closer to six months of age.
Intact males who are not allowed to breed lead lives of not-so-quiet desperation and stress, while intact males who are allowed to mate may become aggressive. Neutered males, on the other hand, can be known for their sweet and affectionate temperaments.