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Why My Cat Growls

An intense image depicting a cat in a defensive posture, emitting a growling sound.

Dog owners are used to hearing their pup growl from time to time, but did you know that it’s not uncommon for cats to growl as well?

Cats use a broad range of vocal sounds directed at members of their own species and also humans to convey their emotions and intent. The sounds a cat makes are split into three forms of verbal communication: vowel sounds, murmur sounds, and hostile calls.

Although it can be tricky to translate all the sounds your kitty makes, cat growling is typically indicative of a hostile sound associated with fear or anxiety, aggression, frustration, and/or pain.

Let’s decode how cat growling sounds, it’s communicative meaning, and the best way to behave when faced with a growling feline.

What Is Cat Growling?

Cat growling is a “strained-intensity” sound produced with the mouth open that usually communicates a negative emotion. The mouth usually isn’t as wide open during growling as with other strained intensity sounds like snarling, yowling, or howling. Cat growling may also be dispersed with hissing.

Feline growling is used in offensive and defensive interactions, among cats and toward people and other pets.

How Does Cat Growling Sound?

Susanne Schötz from Lund University defines the growl sound as rasping, harsh, frequently and quickly pulse-modulated, low pitched (100 to 225 hertz) of typically long duration. It’s produced through a slow exhalation as the mouth is kept slightly open.

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The duration of the growling sound and intensity shift can express variations within the motivation of the cat while making the growling vocalization. Usually, growling is either intermingled with howling, hissing, moaning, and yowling or a transitional vocalization between a growl and a howl.

Growls throughout a fight may vary between 400 and 800 hertz (Houpt, 2004).

Why Do Cats Growl?

1. A Warning Sign to Back Off

The growl can signify a warning to back off! Hissing and growling are usually indicative of your cat’s negative feeling, which might be triggered by anxiety from a stranger entering your home, annoyance with a certain situation, or fear from insecurity.

Pay close attention to your cat’s warning signs—tense body, twitching tail, growling, piloerection (hair standing up), ears pinned back—before it escalates into aggression.

2. Territorial Protection of Their Core Area

Cats are particularly territorial. Territories are vigorously guarded with offensive and hostile behaviors displayed toward trespassers in order to protect the resources within. This is communicated through strained intensity vocalizations like growling, hissing, and yowling, as well as scratching and biting, especially if the cat is unable to avoid the situation or person and flee to a safe place.

Unknown, free roaming male cats also aggressively protect their territory from competing males to thwart reproductive approach to females.

3. Food Guarding

Certain cats make growling-like noises when eating, warning others to not attempt to steal their food similarly to dogs. Although the precise meaning of this is unknown in felines, it often happens when the value of the food is extremely high, for example when eating fresh meat or high-value treats.

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Minimize conflict in multi-cat households by providing sufficient resources for every individual and not feeding meals in close proximity to one another.

4. Invasion of a Feline Intruder

Cats living in groups usually display amicable behaviors toward each other. However, feline intruders (new cat within a household, those unlawfully accessing gardens and courtyards) which are non-group members are typically treated hostilely through agonistic vocalizations and body language like growling, hissing, spitting, chasing, and hostile posturing to make themselves appear bigger and fend of intruders.

5. When In Pain

Acute or chronic pain can cause a feline to growl or hiss on approach. Likewise, a feline may grunt when touched on a wound or aching area.

Since cats are masters of disguise and generally hide any signs of discomfort, look out for the other signs of illness or distress: loss of appetite, inactivity, sleeping more, increased vocalization, decreased grooming, litter box aversion, and changes in social contact with caregivers.

Medical conditions like osteoarthritis, dental disease, trauma, infections, and thyroid dysfunction may cause a cat to growl.

6. Your Cat Feels Frightened or Anxious

Another reason cats growl is out of fear or anxiety.

A cat that had no socialization or inadequate socialization, or experienced aversive encounters with people during kittenhood may confronted with social interaction without the ability to avoid the situation or escape may behave aggressively by hissing, growling, swiping, or biting in an attempt of self-defense. A particularly fearful cat is likely to find physical contact with humans aversive instead of positive, so interactions with such cats should be supervised by a professional and kept as minimal as possible to avoid “flooding” (prolonged exposure to high intensity fear).

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Introducing a new kitten or adult cat to the household, or leaving your cat in an unfamiliar environment like a vet clinic or boarding facility, can induce a fear/anxiety response causing your cat to act aggressively by growling, hissing, and spitting at the carer or at another pet.

The cat in the following video growls when placed in a new setting.

7. Due to Frustration

Lastly, a cat may growl due to frustration. Frustration usually occurs when a feline is unable to gain instant access to something it wants or when it can’t prevent its personal or territorial space from being raided. One example is when a cat is locked indoors and sees another cat in the garden or through a window.

To minimize redirected aggression often caused by frustration, develop a predictable routine and provide cognitive enrichment to enhance your cat’s well-being.

How Should You React to a Cat Growling?

Be observant and listen to your cat when it is communicating some kind of dislike or annoyance.

If the cat is growling at you or at a stranger, quietly step away and stop pursuing any contact until the cat returns to normal calming state. Alternatively, move slowly to an area that is distant from the kitty.

Usually, a cat will be hesitant to attack the person unless the cat feels there’s no other option, especially if the individual continues to approach or participate in contact.

Importantly, avoid yelling or punishing your cat since it may exacerbate the fear/anxiety response, which can worsen or reinforce the aggression.

If the growling is directed toward another cat or dog, separate both pets and resume the re-introduction process after your cat is fully calm.

Your cat’s vocalization and body language can tell you plenty about their state of mind. Whenever possible, try to identify the reason behind the growling.

If your cat suddenly starts growling or the growling intensifies in severity, arrange a veterinary health check as soon as possible.

With patience, understanding, and compassion, your cat will return to a relaxed, loving, and snuggly kitty.

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