Yes, cats can kill and eat rats, but rats are not always easy prey.
Cats are most likely to hunt young, small or vulnerable rats. Large adult rats can be surprisingly difficult and risky for a cat to attack, so many cats prefer smaller prey such as mice.
A cat may kill a rat without eating the entire animal, eat only part of it, or simply stalk the rat without attempting a capture.
That is why the familiar idea that introducing cats will automatically eliminate a rat infestation is misleading.
Do Cats Eat Rats?
Yes.
Domestic cats are predators and are capable of catching, killing and eating rats.
However, whether a cat actually attacks a rat depends on several factors:
the size of the rat;
the age of the rat;
the cat's hunting experience;
how hungry or motivated the cat is;
whether easier prey is available;
and whether the rat can escape into shelter.
A small juvenile rat may be an attractive prey item.
A large adult Norway rat is a much more difficult opponent.
Do Cats Kill Rats?
Yes, but not as frequently as popular culture might suggest.
Cats certainly can kill rats, and individual cats may become skilled rat hunters.
But research on urban rats suggests that large city rats are often less vulnerable to cat predation than mice and smaller rodents.
One field study monitored feral cats and a known colony of urban rats in New York City.
Researchers recorded hundreds of cat-and-rat observations over 79 days.
Although cats regularly entered the area, only a very small number of direct attacks and confirmed kills were recorded.
The rats instead changed their behavior and spent more time avoiding exposed areas when cats were present.
Why Don't Cats Kill More Rats?
Predators have to balance the energy gained from prey against the risk of injury.
A mouse is relatively small and vulnerable.
A large adult rat is:
heavier;
stronger;
equipped with large incisors;
capable of biting;
and more difficult to subdue.
If a cat has access to smaller rodents, birds, insects or human-provided food, attacking a large rat may simply not be worth the risk.
Do Cats Prefer Mice or Rats?
In general, mice are easier prey.
Adult house mice usually weigh only a fraction of what a large city rat weighs.
The difference in prey size changes the hunting equation considerably.
A cat can overpower a mouse quickly.
A large rat can turn and defend itself.
This helps explain why the classic image of a cat controlling rats does not always match what researchers observe in urban environments.
Do Cats Eat the Rats They Kill?
Sometimes.
Predatory behavior and feeding behavior are related but not identical.
A cat may:
catch and eat most of a rat;
eat only selected parts;
kill the rat but leave it;
bring the dead rat to another location;
or abandon the hunt entirely.
Well-fed domestic cats can still hunt because predatory behavior is not controlled solely by hunger.
Why Do Cats Hunt if They Are Not Hungry?
Hunting is part of normal feline predatory behavior.
A cat's predatory sequence may include:
detecting movement;
watching;
stalking;
chasing;
pouncing;
capturing;
and sometimes eating the prey.
A full food bowl does not necessarily switch off this behavioral system.
This is why well-fed outdoor cats may still catch rodents and other animals.
Can a Rat Hurt a Cat?
Yes.
A large rat can defend itself with its incisors.
A struggling rat may bite a cat on the:
face;
nose;
paws;
or legs.
Bite wounds can become contaminated or infected.
This risk is another reason some cats hesitate before attacking a large adult rat.
How Big Can a Rat Be Compared With a Cat?
Even a large rat is normally much lighter than an adult domestic cat.
But prey does not have to be the same size as a predator to be dangerous.
A large Norway rat can be muscular, agile and strongly defensive when cornered.
The New York field study examining cat-rat interactions specifically noted the difference between tiny mice and much larger urban rats.
This distinction is important when asking whether cats are effective rat predators.
Will Having a Cat Get Rid of Rats?
Not reliably.
A cat's presence may influence rat behavior.
Rats may become:
more cautious;
less visible;
more likely to remain near shelter;
or active at different times.
That can create the impression that the rats have disappeared.
But fewer visible rats does not necessarily mean the population has been eliminated.
Are Cats Good Rat Control?
Cats should not be treated as a complete rat-control strategy.
The 2018 urban field study found that cat presence clearly altered rat behavior, but direct predation was uncommon.
The researchers warned that using feral cats specifically for city rat control may provide little direct population-control benefit while creating predation risks for other wildlife.
For a real rodent infestation, controlling:
food sources;
garbage;
water;
shelter;
and building entry points
is generally more important than simply adding a cat.
Do Rats Avoid Cats?
They can.
The New York study found that rats altered their space use when cats were present.
With increasing cat activity, rats became more likely to move toward shelter and less likely to appear where cameras could detect them.
This is an example of a predator having an indirect effect even without killing much prey.
Can Cats Smell Rats?
Cats have highly developed sensory systems for detecting prey.
They can use:
hearing;
smell;
vision;
and sensitivity to movement
when investigating rodents.
A cat may therefore become intensely interested in a wall, cabinet or storage area because it has detected activity that a person has not noticed.
However, a cat showing interest in an area is not proof by itself that rats are present.
Do Cats Eat Baby Rats?
Yes, young rats are more vulnerable to cats than large adults.
They are:
smaller;
less experienced;
less capable of defending themselves;
and easier for a cat to carry.
This matches the general tendency of predators to prefer prey that can be captured with less danger and energy expenditure.
Do Feral Cats Eat Rats?
They can, but being feral does not automatically make a cat an efficient hunter of large rats.
Feral cats hunt a broad range of small animals.
When large rats are available alongside smaller, easier prey, the cats may not focus on the adult rats.
The documented urban rat study involved free-ranging cats and still found relatively little direct rat predation.
Do Indoor Cats Know How to Kill Rats?
Predatory behaviors are deeply rooted in cats, but hunting skill also improves through experience.
An indoor cat that has never encountered a large live rodent may not immediately know how to handle one safely.
It may:
watch the rat;
stalk it;
play with it;
retreat;
or attempt an attack.
Owners should not deliberately expose a pet cat to rats as hunting practice.
Is It Safe for Cats to Eat Rats?
Eating wild rodents is not risk-free.
Rodents can expose cats to parasites, pathogens and toxins.
One well-documented example is Toxoplasma gondii.
The U.S. Centers for Disease Control and Prevention notes that cats can become infected with Toxoplasma after eating infected rodents, birds or other small animals.
Can a Cat Be Poisoned by Eating a Poisoned Rat?
Yes, secondary poisoning is possible with some rodenticides.
A rat that has consumed poison can retain rodenticide residues in its body.
If a cat then eats that rat, it may also be exposed.
The risk varies according to:
the rodenticide;
how much the rat consumed;
how much of the rat the cat ate;
and the cat's size and health.
The U.S. Environmental Protection Agency specifically warns that pets and wildlife can be poisoned by eating rodents that have consumed certain rodenticides.
If you know or suspect that your cat ate a poisoned rat, contact a veterinarian promptly rather than waiting for symptoms to appear.
What Should I Do if My Cat Ate a Rat?
If the cat appears normal and there is no reason to suspect poison, monitor it closely.
Contact a veterinarian if:
the rat may have eaten rodent poison;
your cat has a bite wound;
the cat repeatedly vomits;
becomes unusually weak or lethargic;
shows tremors or seizures;
has breathing difficulty;
or develops any other significant abnormal signs.
Do not attempt to identify or treat rodenticide poisoning at home based only on symptoms, because different rodenticides act in very different ways.
Should Cats Be Allowed to Hunt Rats?
Using a pet cat deliberately as rat control is not ideal.
Potential risks include:
rat bites;
parasites;
infectious organisms;
rodenticide exposure;
and injuries from entering unsafe places while hunting.
Outdoor hunting can also affect birds and other wildlife that are easier prey than large rats.
For household rodent problems, preventing access to food and sealing building entry points is more predictable than relying on a cat.
Do Cats Eat Mice?
Yes.
Mice are much closer to the classic size of prey efficiently handled by domestic cats.
A cat may still kill a mouse without eating it, but mice generally present less physical risk than large adult rats.
Cat vs. Rat: Who Usually Wins?
There is no guaranteed winner.
A cat has major advantages in:
overall body size;
speed;
claws;
canine teeth;
and predatory behavior.
But a large adult rat is not defenseless.
It has strong incisors and can inflict painful bites.
For this reason, an experienced cat may decide that avoiding a particularly large rat is smarter than attacking it.
FAQ
Do cats eat rats?
Yes. Cats can kill and eat rats, especially young or relatively small individuals. Large adult rats are more difficult and potentially dangerous prey.
Do cats kill rats?
They can, but field research suggests cats may kill large urban rats less frequently than people assume.
Are cats good at catching rats?
Some individual cats are skilled rat hunters, but cats are generally better suited to smaller prey such as mice than to large adult rats.
Will a cat get rid of rats in a house?
Not reliably. Cats may make rats less visible, but infestation control usually requires removing food sources and blocking access points.
Do cats eat baby rats?
Yes. Young rats are smaller and easier for cats to capture than large adults.
Can rats hurt cats?
Yes. Large rats can bite cats, especially if cornered or grabbed.
Do cats prefer mice or rats?
Mice generally present easier, lower-risk prey than large rats.
Can cats get sick from eating rats?
Yes. Wild rodents can expose cats to parasites, infectious organisms and potentially rodenticides.
Can a cat get poisoned from eating a poisoned rat?
Yes. Some rodenticides can cause secondary poisoning when a predator eats a contaminated rodent.
Do rats stay away from cats?
Rat behavior can change when cats are present. Research has shown rats becoming less visible and moving closer to shelter in response to cat activity.
Final Answer
Cats do eat rats, but they are much more likely to attack small or young rats than large, defensive adults.
Large urban rats can bite back, making them riskier prey than mice.
Research has also shown that the presence of cats may change rat behavior more than it reduces rat numbers: rats hide more and become less visible while remaining in the area.
So cats should not be considered a guaranteed solution to a rat infestation.
And if a pet cat catches or eats a wild rat, remember that hunting carries risks from bites, parasites and rodenticides.
The simplest answer is:
yes, cats can eat rats—but “cats eat rodents” does not mean every cat wants to fight a large adult rat.
Related Reading
Sources Used for Fact Checking
Frontiers in Ecology and Evolution — Urban Cat and Rat Predation Study
Centers for Disease Control and Prevention — Toxoplasmosis Transmission
U.S. Environmental Protection Agency — Rodenticide Safety
Merck Veterinary Manual — Rodenticide Poisoning
