What’s All the Cat Chatter About?

If you’ve ever witnessed your cat chattering while looking at something outside, you’ve probably wondered what this odd behavior is all about. It usually happens like this: the cat is sitting or standing near a window or glass door when they spy a few birds fluttering about or squirrels scampering through the yard. The cat freezes, staring intently at the critters outside, and then, with their mouth held open, the cat’s jaw begins to jitter up and down. It may even look as if they’re cold, like when human’s teeth chatter. Cats may also chirp (a series of very short meows) while chattering.

This unique feline behavior, called chattering, chittering or twittering, depending on who you ask, is not totally understood, but it seems to be connected to a cat’s prey drive and hunting instincts. “It has been theorized that cats chatter as a way to mimic the sounds of the animals they’re hunting to confuse them so they are easier to catch,” says Dr. Aimee Simpson, medical director of VCA Cat Hospital of Philadelphia. Our cats’ crafty nature continues to shock and amaze. 

According to Dr. Simpson, scientists performing research in the Amazon rainforest in Brazil even witnessed a wildcat called a margay imitating the calls of pied tamarin monkey babies so as to lure the adult tamarins to an area where the cat could attack them more easily. “The anticipation of hunting and the frustration of not being able to reach the intended target are also thought to play a role in chatter.”

Understanding Chattering and Chirping

Chattering and chirping are different, though cats tend to exhibit both behaviors when they become excited by the sight of birds or other small prey animals. As Dr. Simpson explains, chirping is a voluntary vocalization — a short high-pitched sound — produced when a cat is excited.

On the other hand, “Chatter is a rhythmic stuttering of the jaw with the mouth opened in a tense position.” This voiceless sound is produced without vibration of the vocal folds. Chatter is more likely to be a reflexive behavior simulating the motion of grasping the prey’s neck in its jaws to kill it. It may also be triggered by a boost of adrenaline caused by the excitement of seeing a prey animal.”

When Chattering Becomes a Problem

Some cats chatter only occasionally and may seem to enjoy the excitement of watching prey animals outside. However, chattering cats might also feel overstimulated, frustrated, or anxious, especially if they are frequently teased with prey that they can’t get to. “Even domesticated house cats maintain their hunting instincts,” Dr. Simpson says. “Trying to capture an animal that can never be reached can be extremely frustrating to cats. That frustration may lead to anxiety in indoor cats.”

A cat who is feeling overstimulated because they cannot capture the target outside may start doing something called “redirected aggression” (acting out against another pet or human in the household). Left unaddressed, this type of behavior can snowball and become a larger problem. Always use caution around an overstimulated chattering cat — you don’t want to get hurt if your cat suddenly redirects their predatory instincts toward you. 

You can do this by observing your cat’s body language to gauge how they’re feeling. “A cat with its tail and ears up wants to interact with you,” Dr. Simpson says. “A cat in a crouched position with its ears flattened against its head is more aroused and should be approached more cautiously.”

If you think your cat is feeling overstimulated or frustrated, Dr. Simpson recommends blocking the view of the animals outside (for instance, putting a curtain over the window) and giving your cat toys or puzzle feeders that will allow them to safely and appropriately exercise their predatory behavior indoors.

Chattering at Other Times

Cats will sometimes chirp even if there are no tiny critters around to hunt. “Chirping can also be demonstrated by a mother cat trying to get her kittens to follow her or a house cat trying to attract the attention of its human — often to replenish an empty food bowl,” Dr. Simpson said.

On rare occasions, chattering can be a sign of a health issue, especially if it happens when the cat is not being stimulated by the sight of birds or squirrels outside. “If a cat is chattering without an obvious stimulus, this could indicate pain from dental disease,” Dr. Simpson says. “Cats do not get cavities, but they are prone to tooth resorption, which can destroy the enamel and expose the sensitive dentin below.”

If you notice your cat chattering without any visual stimulus, and you also observe signs of dental issues like “bad breath, drooling, dropping food while eating” or lack of appetite, schedule a visit with your veterinarian to have your cat’s mouth checked out.