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what is the difference between pet rats and wild rats?

Are Pet Rats And Wild Rats The Same?

Last Updated on: 4th June 2022, 08:56 am

Pet rats and wild rats are different species, so you can’t keep a wild rat as a pet. Although they have a similar body structure and appearance, their lifestyle, behavior, color, and adaptations diverge.

Pet rats are Norway rats that are white, black, tan, gray, or beige. Wild rats are roof rats (also called black rats and ship rats) with little coloring and patterns with puffier fur.

Wild rats are aggressive and antisocial, while pet rats are domesticated to be sociable with humans.

Pet rats have been domesticated over several generations and through cross-breeding. So, they’ve lost many of their instincts, natural habits, and disease risk.

Wild rats can’t be tamed and transformed into pet rats, as it would require multiple generations of breeding and adaptation to achieve this goal.

What Is The Difference Between Pet Rats And Wild Rats?

Here are the main differences between pet rats and wild rats:

  • Species
  • Size
  • Color
  • Posture
  • Eye and ear shape
  • Adaptation
  • Social behavior
  • Fur behavior
  • Lifespan
  • Disease risk

A pet rat isn’t a domesticated wild rat, and it can’t be treated as such.

Here is a table describing the major differences:

Pet RatWild Rat
SpeciesNorway rat (Rattus Norvegicus domestica)Roof rat (Rattus rattus)
Lifespan2-4 yearsLess than a year (1 year)
Size11-12 inches9-10 inches
ColorWhite, black, tan, gray, and beigeBrown or black
Eyes, Ears & TailRelaxed eyelids, large and rounded ears, and long tailWell-rounded eyes, rigid ears, and short tail
Stance and PostureRelaxed with minimal motionStanding on all fours and always on the move
Fur BehaviorDo not puff fur unless scaredLike to puff their fur
Social BehaviorCalmer and friendlierAntisocial toward humans and other animals  
AdaptationStruggle to survive in the wild, but do well in captivityRespond frantically to environmental change
Disease risksMinimal disease-carrying risksHigh risk of spreading diseases

Are Pet Rats The Same As Wild Rats?

Pet rats and wild rats are different from each other.

They don’t belong to the same species, which is their main point of divergence. Aside from that, they have several visual and behavioral differences, including:

Size And Lifespan

Pet rats usually have a smaller body than their wild counterparts, but they eventually grow larger.

They have a longer lifespan (2-4 years vs. 1 year) that allows them to grow to their full potential. Pet rats are safeguarded against predators and receive ample food and water from their owners.

Wild rats may only appear larger when puffing up their fur to scare away predators. Obviously, some wild rats are outliers, reaching up to 20 inches in length.

Coloring And Patterns

Pet rats are found in various colors, mostly due to cross-breeding. They can be:

  • White
  • Black
  • Tan
  • Gray
  • Beige

This is matched to different color patterns, which include:

  • Striped
  • Hooded
  • Spotted
  • Hooded

Wild rats have no such variety. They can be:

  • Black
  • Grey
  • Brown

Dark coloring works as camouflage to protect the wild rats from predators.

In some cases, a feral rat may have a white underbelly, but the rest of the body will remain black or brown. Without cross-breeding, there’s no way for diverse coloring to develop.

Can Wild Rats Be Black And White?

Wild rats don’t have a black and white coloring. A wild rat will either be black, gray, or brown. Wild rats don’t naturally develop a black and white coloring because it harms their ability to camouflage.

Wild rats usually have the same-colored fur throughout. However, some wild rats may have white or light brown underbellies, which may not be noticeable initially.

If you see a black and white wild rat, it’s probably a cross-breed with a pet rat. Moreover, it would need to have been a product of several generations.

The black and white coloring wouldn’t arrive in 1-2 generations, let alone immediately.


Wild rats are always on the lookout for danger, making them skittish and fearful. This is an instinctual behavior that maximizes their longevity in unsafe conditions.

If cornered, a wild rat will fight its way out and bite you. This species prefers to avoid human interaction at all costs. Given the chance, they’d rather run away from you than fight.

Roof rats react frantically to light and sound, and they’re more cautious of unfamiliar food.

Pet rats are much friendlier toward humans. You can touch and hold a pet rat with little risk of getting bitten or scratched. Depending on their training, they can even form bonds with pets and owners.

This friendly and sociable behavior is a result of long-term domestication.

According to Frontiers in Zoology, this is similar to evolution in that it involves behavioral and genetic alterations to the animal. Pet rats have fewer wild traits, retaining only a few of their original instincts.

can you tame wild rats?

Disease Risk

Wild rats carry deadly diseases, including leptospirosis, salmonella, listeria, toxoplasma gondii, typhus, the plague, and hantavirus. Exposure to these diseases is usually through feces, urine, and bites.

Pet rats aren’t considered a disease threat and carry fewer parasites (fleas, ticks, lice, and mites). They undergo rigorous testing to ensure they don’t have any diseases before being sold as pets.

Sick pet rats are isolated and treated by veterinarians to reduce the spread of deadly diseases.

Can You Tame Wild Rats?

You can’t tame wild rats, and you should not attempt to keep one as a pet.

Wild rats aren’t sociable or friendly around humans. They’ll always seek to hide when exposed to open areas or the attention of other animals.

They display aggressive behaviors when threatened and will respond by:

  • Fighting
  • Biting
  • Chasing
  • Boxing

According to the International Journal of Current Research and Review, wild rats are one of the most dangerous and destructive pests.

Aside from that, wild rats react frantically when moved from their natural habitat. Taking a wild rat into captivity will cause untold stress.

Moreover, wild rats are dangerous to humans and household pets. They can transmit various illnesses directly and indirectly in the following ways:

  • Bites
  • Scratches
  • Urine
  • Poop
  • Saliva

For these reasons, you shouldn’t attempt to tame a wild rat.

Can You Keep A Wild Baby Rat As A Pet?

You can’t keep a wild baby rat as a pet. According to the Medical College of Wisconsin, domestication involves many genetic changes.

This means that it’s difficult to change the genomics of a wild rat by adopting it. It’ll take several generations and cross-breeding with pet rats to domesticate a wild rat.

No doubt, a wild baby rat will look cute and cuddly. However, keeping a wild baby rat as a pet is ill-advised. Just like adults, their temperament is unsuitable, and they carry infectious diseases.

are pet rats the same as wild rats?

Can Pet Rats Breed With Wild Rats?

Although they’re from different species, pet rats and wild rats can breed and produce viable offspring. Both species come from the same evolutionary family, Rodentia.

Pet rats rarely interact with wild rats, so there’s little chance of mating unless you capture a wild rat and bring it home. The likelihood is still low, even then, since wild rats struggle to adapt to captivity.

The constant exposure to light and sound, and lack of hiding places, will cause the wild rat to become stressed and die prematurely. If the rat manages to survive, it may still experience reproductive failure.

According to the American Association Of Laboratory Animal Science, stress reduces fertility, affecting the reproductive performance of rats. This means wild rats in captivity struggle to breed.

If pet rats and wild rats breed successfully, they’ll produce abnormal baby rats (pups). These pups can grow up, breed, and normalize the line after successive generations.

Can Domesticated Rats Survive In The Wild?

Domesticated rats can’t survive in the wild.

Their adaptability is poor, and they lack the necessary skills and instincts for survival. The wild traits of pet rats have been phased out through generations of selective breeding and captivity.

Pet rats have evolved to live in captivity, and they can’t go backward in their evolution. Likewise, pet rats are used to being fed and pampered by their human owners.

Domesticated rats are used to living in warm cages with food, bedding, and water bedding to make them comfortable. They have to contend with snow, heavy rain, wind, and ice in the wild.

Releasing pet rats into the wild also will expose them to predators, including:

  • Snakes
  • Raccoons
  • Bobcats
  • Foxes
  • Weasels
  • Large birds of prey

Domesticated rats may be attacked by wild rats and eventually succumb to injuries.

So, it’s important to recognize that pet rats and wild rats are entirely different creatures.