Maine Coon kitten jumping from couch to ottoman

In This Article

  • Why Cats Act Crazy

  • Predatory Instinct

  • Nocturnal Instinct

  • Senility

  • Fleas

  • FHS

  • Next Steps

  • Read Your Cat

A cat acting crazy may run around the house or get a nightly burst of energy, complete with a chorus of meows. A “crazy” cat can be entertaining to watch, but the behavior could veer into destructiveness, with the cat inadvertently knocking things over, and an increased likelihood that someone gets bitten. The cat may just be embracing its nocturnal or predatory instinct, in which case there are things you can do to support it and minimize the risk of chaos or bodily harm, or the wild behavior could also be a sign that something is wrong with their health.


Watch Now: 6 Reasons Your Cat May Be Acting Crazy

Why Do Cats Act Crazy?

No matter the breed, all cats have moments when they run across a room, meow like crazy, and act as if they're on a racetrack being chased. They dart about, faster and faster, looking all over the place and then suddenly stop in their tracks.

This wild behavior is sometimes referred to as the "midnight crazies" when it happens at night. Your cat may entertain itself with wild activity or jump on your bed to paw at your feet, elbows, hair, or face to get you to join in the fun. The reasons for this wild and sometimes-amusing behavior vary.

Predatory Instinct

Cats are natural predators, and domestic cats retain this instinct to a certain extent. At times, a cat that's acting crazy may actually be exhibiting hunting behaviors, fighting maneuvers, or escape techniques.

A house cat that doesn’t have to hunt for its food still needs to burn its pent-up energy, and it may be in the form of what appears to be crazy behavior. Toys, such as catnip mice, laser pointers, food puzzles, and feather wands encourage a cat to use its natural instincts to grab, chase, and jump. This exercise is especially important for your cat if it doesn’t spend time outdoors.

Nocturnal Instinct

Another reason for your cat’s crazy behavior could be because some cats are nocturnal and become more active at night. If a cat isn't getting enough exercise during the day, it may act especially crazy.

Many domestic cats spend their days alone indoors while their people are at work. When the cat's person comes home in the evening, the cat may be very active and want to play. If it has no outlet for all this energy, the cat may exhibit some crazy behavior. Kittens are especially energetic.

why cats act crazy illustration

why cats act crazy illustration

Illustration: The Spruce / Elise Degarmo


If you have an older cat, it’s possible it’s acting crazy because of some cognitive dysfunction or senility. As a pet ages, its brain may start functioning differently and cause it to exhibit strange behavior for no apparent reason.


Sometimes a cat acts crazy and looks as if something is biting it sporadically because it has fleas. Particularly when meowing is involved, your cat could be hypersensitive to flea bites or simply have an itch in a place it can't reach.

If you suspect your cat has fleas, treat all the furry animals in the household with a prescription product specifically for cats, designed to kill and prevent fleas. You should also see your vet to determine if there are any secondary skin infections of allergies from the fleas that need to be treated. You’ll also need to treat the environment by vacuuming, doing laundry, and using area sprays or flea bombs if recommended by your vet. Once the fleas are gone, your cat should stop this behavior.

Feline Hyperesthesia Syndrome (FHS)

Feline hyperesthesia syndrome (FHS) is a rare reason why a cat may act crazy, although it affects mature cats most often and the cause is unknown.

Discuss the possibility of FHS with your veterinarian if you notice that:

  • The skin on your cat's back appears to be rippling while it's running about.
  • Your cat frequently bites at its back above its tail, even after you've properly treated it for fleas.
  • Petting at the base of your cat's tail or back triggers it to groom, scratch, or bite the area excessively and then run around the house crazily.

Next Steps

Sometimes it's difficult to know exactly what caused your cat to go a little wild all of a sudden. Frankly, cats are hard to interpret! Many people understand basic dog vocalizations and behaviors but don't recognize basic cat behaviors.

Dogs have expressive faces and body language that’s pretty easy to accurately interpret. They wag their tails, make different noises to alert others of their moods, and often follow basic commands to please their people. Cats, on the other hand, are usually known more for their emotional vagueness and standoffish behavior. There is, however, a growing belief that cats are just as expressive as dogs. The problem is that people simply misunderstand or don’t see what or how their cats are trying to communicate.

Learn to Read Your Cat

When it comes to cats, meows and tail waves can mean a number of different things, depending on the situation. With each purr, yowl, or even blink, your feline is actually trying to communicate with you. The problem is figuring out what it’s saying.

Experts say there’s something to gain from these attempts at communication. For instance, learning to read your cat's body language can strengthen your bond with it and allow you to become more effective at responding appropriately to its needs.

Every cat is different, so the best thing you can do to start is to simply observe your cat. Take mental notes of the environment and conditions present when the "crazy" behavior occurs. Pay attention to body language, vocalizations, time of day, and what your cat just did. Did your kitty just eat, groom, or scratch its back? Was there a playful meow before your cat dashed into the other room?

With time and careful observation, you’ll likely begin to piece together the triggers of your cat’s craziness in various situations. This will help you to understand what’s normal for your cat and when any unusual behavior could be a symptom of a medical issue worth investigating with your vet.

If you suspect your pet is sick, call your vet immediately. For health-related questions, always consult your veterinarian, as they have examined your pet, know the pet’s health history, and can make the best recommendations for your pet.

Article Sources

The Spruce Pets uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

  1. Cognitive Dysfunction. Cornell University College of Veterinary Medicine Feline Health Center.

  2. Hyperesthesia Syndrome. Cornell University College of Veterinary Medicine Feline Health Center.

  3. Koyasu H, Kikusui T, Takagi S, Nagasawa M. The Gaze Communications Between Dogs/Cats and Humans: Recent Research Review and Future Directions. 2021 Mar 01;12:645366]. Front Psychol. 2021;11:613512. doi:10.3389/fpsyg.2021.613512

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