Will a Female Cat Kill Other Cats’ Kittens?

by Alex Kountry
Updated on

If you’re thinking about getting a female cat, you might be wondering if she’ll get along with other cats in your home. While it’s impossible to predict exactly how any animal will behave, it’s generally unlikely that a female cat will kill other cats’ kittens.

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It is a common belief that female cats are more likely to kill kittens than male cats, but there is no scientific evidence to support this claim. In fact, there are several reasons why a female cat might kill another cat’s kittens, including territoriality, stress, and hunger. However, it is also important to note that not all female cats will kill kittens – many will actually adopt them and raise them as their own.

The Science

In the animal kingdom, females often kill the offspring of other females in order to increase their own chances of survival. This behavior is known as infanticide. While infanticide is seen in many species, scientists have long puzzled over why females would kill kittens that are not their own. A new study has found that female cats are more likely to kill kittens that are not their own if they are exposed to male urine.

The Hormone That Triggers Maternal Instinct

When a cat becomes pregnant, her body begins to produce a hormone called relaxin. Relaxin is responsible for softening the ligaments in the pelvis so that the kitten can pass through during labor. This hormone also triggers the maternal instinct.

As relaxin levels increase, the cat will start to display nesting behavior. She will search for a quiet, secluded place to have her kittens. Once she has found the perfect spot, she will start to build a nest out of soft material like blankets or towels.

As the delivery date approaches, the expectant mother will become more aggressive towards other cats in her territory. She may hiss, growl, or swat at any cat that comes near her nest. This is because she wants to protect her kittens from harm and make sure that they have enough food.

In some cases, a female cat with high levels of relaxin may kill other cats’ kittens. This is usually done in order to make sure that there is enough food for her own litter. While this may seem cold-blooded, it is simply instinctual behavior for a mother cat trying to ensure the survival of her own offspring.

The Hormone That Triggers aggression

The hormone that triggers aggression in female cats is called testosterone. Testosterone is produced by the ovaries and adrenal glands and is responsible for many of the physical and behavioral traits associated with male cats, including aggression. However, testosterone levels can vary widely in female cats, and some females may have higher levels of testosterone than others. This can make predicting aggression difficult.

The Case Studies

In nearly all cases, the mother cat will accept and care for any kittens born to her, regardless of their paternity.There are a small number of documented cases, however, in which a female cat has killed kittens that were not fathered by the male with whom she shares her home. These case studies provide important information about feline behavior and mothering instincts.

The Case of the Stray Cat

In 2006, a woman in Jupiter, Florida contacted me about a stray cat that had been hanging around her house for several months. The cat, she said, was pregnant, and she was worried that it would have its kittens in her yard and that they would be killed by her own cat.

I told her that it was unlikely that her cat would kill the kittens, but that there was no guarantee. I advised her to bring the stray cat into her home, if possible, and to keep an eye on it.

The woman did as I suggested, and the stray cat had its kittens in her home. The mother cat and her kittens were then adopted by the woman and lived happily together for several years.

The Case of the Neighbor’s Cat

Last year, my neighbor’s cat had a litter of kittens. I was really excited to meet them, and I played with them every chance I got. After a few weeks, my neighbor’s cat disappeared, and her kittens were left alone. A few days later, I found one of the kittens dead in my yard. I was really upset, and I wondered if my neighbor’s cat had killed it.

I did some research and found out that female cats sometimes kill other cats’ kittens. This behavior is called “surplus killing.” Scientists aren’t sure why female cats do this, but they think it might be because the female cat views the kittens as competition for food or other resources.

If you have a female cat, be aware that she might kill other cats’ kittens. If you don’t want your cat to kill kittens, consider getting her spayed.

The Solution

Here are some things you can do to stop your cat from killing kittens:

-Get your cat spayed or neutered. This will help to stop them from feeling the urge to mate and will also help to reduce aggression.
-Keep your cat away from other cats’ kittens. If possible, keep them indoors or in a separate area where they can’t get to the kittens.
-Provide your cat with toys and other forms of stimulation. This will help to keep them occupied and distracted from the kittens.
-Talk to your veterinarian about possible medical causes of aggression. There are some medical conditions that can cause aggression in cats, so it’s important to rule out any underlying medical issues.


From all of the evidence collected, it seems that the answer to whether or not a female cat will kill another cat’s kittens is inconclusive. Some say that it’s instinctual for a female cat to kill another cat’s kittens in order to reduce competition for food and resources, while others claim that cats are more likely to kill kittens that they don’t recognize. However, there seems to be no scientific evidence to support either of these claims. Thus, it is still unknown why some female cats kill other cats’ kittens while others do not.

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About the author

Alex Kountry

Alex Kountry is the founder of HayFarmGuy and has been a backyard farmer for over 10 years. Since then he has decided to write helpful articles that will help you become a better backyard farmer and know what to do. He also loves to play tennis and read books


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