Rodents are a group of small pets. They were first introduced in The Sims: Livin' Large and reappeared in The Sims 2: Pets, The Sims 3: Pets, and The Sims 4: My First Pet Stuff.

The Sims: Livin' Large

The guinea pig is first introduced in Livin' Large. If a Sim is bit by a guinea pig whose cage hasn't been cleaned for a long time, the Sim will become sick. The fastest and easiest way of curing this sickness is to buy the guinea pig painting and look at it.

The Sims 2: Pets

The Sims 2: Pets adds womrats. They can be purchased by buying the FMCU 3000 in buy mode, and then using the cage's "Restock" option, which can only be done if the cage is empty and clean. Womrats cost §75.

There are a variety of womrats to choose from:

• Black
• Whitebrown
• Rex
• Panda
• Albino

Gallery

A Sim playing with her womrat.

The Sims 2 Apartment Pets

In The Sims 2 Apartment Pets, Richard the hamster and Smudge the guinea pig are a couple of the pets located in the Sim's apartment. The player can buy toys for them, play with them, and dress them up. They do not need to be fed and they will never die.

The Sims 3: Pets

Rodents are one of the various kinds of minor pets introduced in The Sims 3: Pets. They can be caught outdoors like other collectibles. Rodents can be kept temporarily in the inventory, but they might eventually run away if kept for too long. Rodents must be placed in terrarium and fed regularly.

Being a collectible pet, there is no limit to the number of rodents a Sim can collect.

Terrariums

Rodent Terrarium
Game	The Sims 3: Pets
Buyability	Buy mode
Price in game	§350
Size	2x1

List of rodents

Although they are referred to as rodents in-game, shrews and hedgehogs are not actually rodents.

The Sims 3: Pets introduces 7 Rodent types. Each has its own rarity and worth.

There are only 3 common rodent available via the "Stock a Terrarium" option. The rest must be caught in the wild.

Level	Image	Name	Rarity	Min Value	Max Value
1		Rat	Common	§3	§8
1		Womrat	Common	§10	§15
1		Squirrel	Common	§20	§30
5		Chipmunk	Uncommon	§100	§125
5		Shrew	Uncommon	§200	§250
5		Pygmy Hedgehog	Rare	§650	§700
5		Chinchilla	Rare	§850	§1,000

In addition to the regular rats found in Pets, another breed of rats are found in the rarely encountered squatter lot challenge, where they cannot be interacted with other than to shoo them away.

The Sims 4: My First Pet Stuff

The Sims 4: My First Pet Stuff adds four new rodents in special cages. Unlike cats and dogs, rodents do not have life stages. However, they can still die of old age or starvation. When a rodent has passed away, a notification will appear, and the rodent's "soul" can be seen leaving the cage. While all four animals are referred to as rodents in-game, hedgehogs are not true rodents.

Sims can buy the Feat Anti-Aging Treat (§300) to halt their aging. The treat can be purchased on the computer or at a vet clinic.

Rodents

Image	Name	Price	Description
	Hamster	§400	Stomp your feet and clap your hands, c’mon, everybody, it’s the hams… *record scratch* “…shhh; they must never find out about the dance! Back to plotting our escape!”
	Pygmy Hedgehog	§500	Perhaps you have a prickly personality… if so, the Pygmy Hedgehog may be the right pet for you. Before hedgehogs came into existence, they lived in the ocean as the creature we call sea urchins. While there’s still disagreement over what caused this critter to grow legs and walk onto land, acknowledging that they make fantastic pets is settled science!
	Rat	§600	San Myshuno! It’s a wonderful town, well… except for its infamous rat infestation. Running through the sewers, crawling through apartment building walls; they’re everywhere! What’s a mayor to do? Thankfully, there’s nothing a little political spin can’t fix… Can I interest you in a pet rat? How about two?
	Bubalus	§700	After a talking plush of Bubalus became the best-selling toy of 2016, pet breeders saw an opportunity they were uniquely qualified to seize upon. Using genetic engineering, they’ve taken the body of a Hippopotamus, the color and spiral shape of a Violet Sea Snail, and the fur, size, and disposition of a Hamster, to create a new species of animal dubbed the Dwarf Bubalus. Now you can have one of these once fictional creatures to call your very own!

Cage

A single cage cannot have more than one rodent in it. Sims will need to refill their rodent's food bowl and clean their cage regularly to ensure that they stay healthy and satisfied.

The following interactions are available on rodent enclosures:

• Clean Habitat
• Fill Food
• Feed Treat
• Observe
• Play With
• Purchase Rodent
• Release
• Rename
• Study Rodent (Children/Teens only)
• Talk
• Investigate and React (Cats and Dogs only) (Require The Sims 4: Cats and Dogs)

The cage has a corkboard that Sims can pin postcards on.

Rodent travels

Rodents in My First Pet Stuff can travel to far-away lands. They sometimes leave their cage, and bring back a postcard from where they traveled to. A note can be seen in the cage, notifying that they have left. If Sims do not want their rodent to go on adventures, they can purchase the IQ limiter vet treat (§350) which will set their IQ to a normal level.

Notifications will inform the player about their rodent's adventures along the way.

Image	Name	Description
	Thank you!	The doctors at the Sacred Spleen Memorial Hospital wish to express their gratitude to the Rodent. 2018 will be remembered in medical history as the year that a fully functioning ear was grown on Rodent's back, which was then transferred to a Sim suffering from anotia. Here's to you, Rodent!
	Book Royalties Received	Ghostwritten under the pseudonym Stephen Rat King, "Redundant Rodent Realities: The Life & Times of Rodent" continues to chart on the San Myshuno Times best sellers list. The books publisher, Printed Arts, is thrilled to deliver this royalty payment and express their eager anticipation for "Stephen's" upcoming novel.
	Tiny Space Delivery	Rodent's miniature rocket launches have resulted in a lucrative asteroid mining operation. It's graciously placed some of the space minerals it returned with inside the household's inventory.
	Thank you!	At FutureSim Labs, we thought we needed to conduct tests on guinea pigs in the name of scientific advancement, but it was a different kind of rodent that showed us the way. Our deepest gratitude to Rodent for assisting in our breakthrough discovery!
	Tiny Rodent; Big Adventure	Rodent was thinking about you during its travels, and brought a postcard back to share! OR Rodent brought you a postcard from its grand adventure. This little rodent traveled an awfully long way!
	Times Up, Rodent!	Anyone seen a rodent around here? Goes by the name Rodent? Let 'em know that Don Landgraab is looking for a payment, if they want to continue to feel "protected".
	3... 2... 1... Blastoff	Fascinating... Rodent appears to be conducting experiments on reaching escape velocity from its habitat.
	Nuclear Blast Detected!	Trace signatures of radiation seem to be lingering by (Rodent Name)s habitat. Thankfully readings are low enough to pose no danger to Sims. Just what kind of trouble is that rodent getting into?
	Rodent Rave	...was that music coming from Rodent's habitat? That rodent is showing how far critters have come since the hamster dances of the aughties!

Rodent Fever

If a rodent's terrarium gets dirty, rodents may contract Rabid Rodent Fever. Sims who play with these animals can be bitten, resulting in a "Bite-Sized Bite" moodlet that lasts for two hours. Sims are more likely to be bitten if they have a poor relationship with the rodent they are playing with. After two hours, the moodlet will either expire or turn into the "Fuzzy Feeling" moodlet that lasts for an additional 24 hours. Each subsequent stage of the disease lasts 24 hours: Sims will get the "Fuzzy Fever" moodlet in the next stage, where the disease becomes contagious to other Sims, and will transition to the "Rabid Rodent Fever" moodlet in the final stage of the disease. They will die of the disease after this moodlet expires. Their ghost will appear as an oversized hamster foaming at the mouth.

At all stages of the disease, Sims can cure themselves either by buying rodent remedies using a computer or asking about the fever at the local vet clinic. Ghosts can drink the serum^[which?] to cure foaming and transform back to human form.^{[confirmation needed]}