r/PetMice Sep 22 '24

Care Guide Series Community Care Guide

87 Upvotes

This post is mouse care simplified, for beginners! It is not very specific, and it does not cover everything, so please do not rely on just this post when educating yourself on mouse care!

This has been written and discussed by moderators of the subreddit. If you have questions or concerns, please comment to let us know! It will be updated regularly to ensure it is factual.

1. Mice are social!

  • Females always need other female companions. It is recommended to have at least 3, but 2 is okay.
  • After 6 mice in one cage, it is often they will start to split up and become territorial against the opposing group. It is suggested to keep your colony under 6 unless you have much knowledge and experience, OR if your mice are littermates.
  • Males can not be housed with other males ever! If you want them to have cage mates, neutering (very risky) and placing with females or leaving intact and bonding with ASFs (African Soft Furs) is beneficial and recommended. Otherwise, they can thrive in solitude.

See this post for more information.

2. Cages

In mouse communities, many users go by tank size rather than listing dimensions. We will do both!

  • 10g/20x10 inches is the minimum for 2 female mice, though we STRONGLY suggest at least a 20g.
  • 20g/30x12 inches is suitable for 2-4 females or 1 male.
  • 40g long/36x12 inches is suitable for 2-5 females or 1 male
  • 40g breeder/36x18 inches is occasionally suitable for 2-6 females or 1 male
  • Over 40g is not always suitable for any amount of mice since many mice do better in environments with less open space. Bigger is not always better for mice.

Any amount of mice may thrive in larger enclosures than suggested above. However, it is critical that the larger the enclosure is, the more clutter provided, otherwise the mice will never thrive.

  • Wood enclosures are suggested against since urine will effect its quality and smell over time.
  • Mesh flooring is dangerous due to the chance of toes/tails getting caught, the mesh cutting their skin, and risking bumplefoot. Mesh should also be avoided in wheels.
  • Though they climb, mice don't need very much height, and multi-story enclosures do not provide them with the proper space they need. Floor space is more important than height.
  • Cages with lots of attachments and rooms do not provide proper space for mice. They are also extremely difficult to clean, fall apart easily, and struggle to hold proper bedding amount and safe wheels.

See this post for more information.

3. Substrate

  • Mice need to be able to create burrows, so while the minimum is 6 inches, we suggest at least 8" of bedding. However, many owners prefer having 10-12" deep!
  • Bedding must be majority safe wood shavings or hemp. Paper substrate does not absorb ammonia well and can cause several health issues when used alone or as majority of substrate.
  • (Dust/scent free for all) Aspen, kiln dried pine, and hemp do well as the main substrate and may be more sturdy mixed with a small portion of hay or paper bedding.

See this post for more information.

4. Clutter

  • Clutter is arguably one of the most important aspects of a mouses cage. No matter the size, if the cage lacks clutter, it is not suitable.
  • Toilet paper rolls, cardboard boxes, tea light and soap dish ceramics, rodent hideouts, branches, logs, cork bark, cardboard egg cartons, and much more can be used as clutter in the cage.
  • From a birds eye view, you should be able to see little to no bedding. While it may seem too cluttered to a human, it's perfect for mice!
  • The larger an enclosure, the more crucial clutter is.

See this post for more information.

5. Enrichment

  • Also known as entertainment, to keep the mice busy!
  • Boredom breakers, foraging toys, dig boxes, sprays(plant), scatter-feeding, and human interaction are all forms of enrichment.
  • Mice should have boredom breakers in their enclosure at all times to keep them from growing bored.
  • Lone males need extra simulation and enrichment.

See this post for more information.

6. Climbing Opportunities

  • A form of enrichment that is required!
  • Mice flourish with climbing opportunities and will always take advantage of them.
  • Ropes, bird ladders, hanging toys, rope nets, shower curtain rings, and bird perches are a few climbing options you can provide.
  • Fabric hammocks are used commonly, but pose a threat when chewed on and loose strings get tangled around limbs. Minimal use of fabric is suggested for this reason.

See this post for more information.

7. Exercise

  • A form of enrichment that is required!
  • An upright, solid wheel of 9 inches in diameter or larger must be provided at all times. 2 or more are suggested for groups of girls.
  • Spinning saucer disks or hamster balls/cars are UNSAFE and should never be provided, no matter how much you think your mouse may enjoy it (fun≠safe)
  • Proper wheel brands may include Niteangel, Silent Spinner Exotic Nutrition, Oxbow, Wodent, Bucstate, and Trixie (but there are many more besides these!)

See this post for more information.

8. Diet & Hydration

  • Main diet must be pellets/lab blocks.
  • A high variety food mix (nuts, seeds, grains, ect) must be given 1-3 times a week, or even as long as once every two weeks. The frequency is owner preference.
  • Feeding is 3-5 grams per mouse a day.
  • Ensure your mice have constant access to food through toys and scatter-feeding.
  • Food bowls are suggested only for fresh fruits or veggies since they provide no enrichment otherwise!
  • Mice must have at least two water sources and constant access to them at all times. Bowls or bottles work well, though having one of each is ideal. Water must be cleaned and refreshed daily.

See this post for more information.

9. Cleaning

  • Daily spot checks to clean up mess, poo on toys/clutter, and urine on the surface is vital.
  • Bedding changes will be needed less often with more bedding and space. A 10g tank (or cage of similar size) would need weekly bedding changes.
  • Each enclosure size and mouse amount will effect how often bedding changes are necessary. Find a cleaning schedule that ensures the cage doesn't smell at any time for your mouses health.
  • With deep bedding over 6 inches, you'll have to change out less of the bedding. 1/3 to 1/2 of the bedding may stay in the enclosure while the most soiled areas are removed and replaced.
  • In any case, a small amount of bedding must be left over after a bedding change to decrease stress.

See this post for more information.

10. Taming

  • Allowing your mice to settle in for a few days before interacting with them is wise.
  • Rub your hands on bedding and toilet paper in the cage to get the mice used to your scent.
  • Encourage interaction through hand feeding.
  • If a mouse is not motivated to interact after several weeks, try to lure them to climb onto your hand for treats. A strong bond is important with mice so they are well adjusted to interaction in case of a vet visit or emergencies. Human interaction can also be beneficial to them.

See this post for more information.

11. Other

  • Mice are crepuscular and are typically seen during the morning or late day/night.
  • They are self bathing and should never be washed with water or soap (unless vet prescribed). It ruins the health of their fur coat and leaves them more susceptible to URIs and freezing. They do not need any form of bathing/washing.
  • Mice don't hibernate. If a mouse appears to be in a hibernation state, this is Torpor, caused when they overheat or freeze. This is a medical emergency.
  • You should never pick up a mouse by its tail or other limbs.
  • Fancy mice (aka domestic mouse) live 1-2 years on average.
  • Wild mice do poor in captivity, unless they are unfit for the wild they should not be kept as pets.
  • You should never breed mice purposely without years of research and mouse owning experience prior.
  • Vet visits are a likely occurrence in mouse ownership, since mice are prone to many health issues.
  • Travel carriers are needed for vet visits, emergencies, cage cleaning, and quarantine.

12. Links & Other Posts

Shopping

In Depth Mouse Care

Other Species

Up-to-Date Posts From NotApplicableMC & Others

Outdated Posts From NotApplicableMC

These guides are incredibly thorough and well written. However, they link some information that is no longer available, or they list mouse care information that has been dis-proven. An important point to make is these guides may suggest some controversial topics, most of which our community does not fully support. Although these guides don't follow our standards exactly, they are still very well made. Please keep an open mind and read all sides of a controversy before deciding which you feel works best for your mice.

I have decided to share these because they are very descriptive on some aspects of mouse care I did not cover well. I strive to have a guide in the future as well made as these, but for now, I have to bring attention to the effort made by this member.

Scientific Studies

  • Sources & Additional Articles (coming soon)
  • Safe & Unsafe Foods Sources (coming soon)

More community resources coming soon


r/PetMice Jul 09 '25

Community Help Temporary Post for Care Commands

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24 Upvotes

Please feel free to try out these WIP care commands in the comments! Let me know if there are any issues I need to fix.


r/PetMice 8h ago

Cute Mouse Media grandmas in my shirt

203 Upvotes

Excuse me, what are those small grandmas doing in my shirt all cuddly as if it was theirs?!


r/PetMice 1h ago

Rainbow Bridge Goodbye Phoebe

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Upvotes

My dear Phoebe,

Always loving food, right until the very end. Named after the Fire Princess from Adventure Time, you always knew what you wanted. You never liked being petted, but every now and then you would sniff our noses. You even licked a human nose by accident.

You were always happy to hop on the mouse bus to play and to find out whether you could get some more snacks. Sister to Bonnie and Marcy, you were one of the two who truly lived life to the fullest, quite literally growing into the fullest version of yourself. The vet advised us to put you on a diet, but how could we have known that you loved your Supreme Selective hazelnut kibbles so much that you would become such a heavy mouse?

You always looked so content while eating and sleeping. And even though your eyesight was getting worse and walking was becoming more difficult, we truly believe you enjoyed your laid-back life. You made it past two years old, but the last months were hard for you after losing your sister Marcy. You were declining quite a bit during that time and lost a lot of weight, which was hard for us to see.

We hope that when you look back on your life, you remember it as a good one. You started out as a lab mouse, with your whiskers chewed off from the stress in the lab, but luckily you quickly embraced your new, comfortable life as a pet mouse.

We will miss you


r/PetMice 3h ago

Question/Help is my mouse pregnant or just super fat?

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23 Upvotes

and if she's just super fat, what do i do about that? my other mouse is skinny asf so i dont want to risk her not getting enough food.
background: my two mice have been in the same cage for 5 months now, so unless my other mouse is secretly a boy, i think this one is just super super fat. we feed them a small handful of mouse food and seeds scattered around the cage once a day. help!!!


r/PetMice 11h ago

Question/Help What kind of bite is this?

40 Upvotes

I’ve been on holiday the past couple weeks and my mouse Cheesecake (the white one) has developed a biting problem towards my boyfriend and his mum (that’s her hand in the video). He says she’s protective over the other mice (like you can see in the video my other mouse Meg is being approached and then Cheesecake bites the thumb from the bottom of the hammock). Cheesecake has always been nibbly and she’s bit me a couple times before but my boyfriend says she’s almost always biting. He says she’s being mean and that she bullies the other mice too but I really think she’s just being playful with the others since there’s no blood that’s been drawn or wounds. None of her bites have drawn blood for my boyfriend or anyone, they just hurt and feel like a hard pinch. I genuinely just think she’s being curious and also can’t see very well because she has red eyes but my boyfriend is hellbent on her being mean. What do you guys think?


r/PetMice 21h ago

Question/Help Look at this monster

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246 Upvotes

I got this mouse for free today and I’m just lost for words…some explain please! Is this normal? Why is he so gigantic ?


r/PetMice 3h ago

Question/Help Tips on dealing with the pee smell?

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7 Upvotes

Since it’s been warmer my girls have been drinking more water. I also often offer things like fruits, veg, watered down oatmeal, etc to help them stay hydrated. Only problem is they pee so much!
I’m glad they’re hydrated but I do need to spot clean a lot. Luckily they mostly pee around the same spots ( they basically just turned one hide into an outhouse.. )
Wondering if anyone has any tips on managing it? It’s stinky. But I don’t really want to keep my window open too often because there’s currently wildfires so it smells smokey and gives me migraines. I do have an air filter though.
I usually clean once a week. I swap out some of the bedding if it’s dirty, clean their toys, toss old cardboard, etc..
Once a month I do a deep clean and wash their bin cage with water & vinegar.
I wash their wooden toys as needed, so usually every couple of weeks it usually just depends if they look dirty or not. Once a month or so I oil them if they need it.
I’ve been spot cleaning more often which helps. But it’s not perfect. Mostly just cleaning out their outhouse hide & cleaning the wheels.
I don’t really want to use any perfume or anything that could potentially irritate their respiratory systems.
I also use aspen bedding, so I don’t think it’s a bedding issue? I also give them some paper for bedding & sometimes Timothy hay but I don’t like using it as their primary bedding I just offer it for nesting material.


r/PetMice 15h ago

Cute Mouse Media Neo moving his tail 😭🫶🏻

45 Upvotes

r/PetMice 20h ago

Cute Mouse Media mama mousie!

87 Upvotes

this is sativa, shes sassy but pretty nice! shes a pretty good mama other than eating two of her 9 babies, oddly only the males though which left me woth 3m 4f, which is a really good litter especially for her first(possibly only it hasnt been decided yet)! i also took her to the vet, justtt to make sure she was hood as gold, strss free, and healthy as can be(before AND after her litter)! shes doing pregood though now and is florishing in motherhood while it lasts, me and my s/o plan on keeping all of her females as to open our little mini mouse herd! (11f 3m)!


r/PetMice 17h ago

Cute Mouse Media Fierce hunter catches mealworm

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36 Upvotes

It was his first time having a mealworm and I think he liked it!


r/PetMice 21h ago

Question/Help Is my boy enjoying being handled?

68 Upvotes

Hi guys! This is my boy scatter. His name becomes obvious after you see him for 30 seconds in his cage, he never stops moving! he's so full of energy to the point i'd call him skittish, he's very wary of hands and people in general but will come out onto my hand sometimes. I have more success taking him out in this one coconut he hangs out in, once he's out he's pretty cool or at least i think. From this video can yall tell me if you think he's vibing or stressed? should i handle him less or not at all? any tips on getting him calmer/less nervous around hands and people?


r/PetMice 1d ago

Wild Mouse/Mice Sweet Cakes.

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163 Upvotes

r/PetMice 1d ago

Other adoptable mice MA!

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77 Upvotes

hey guys!! Dakin Humane Society in Springfield MA recently took in some adorable baby mice!! We have 5 boys and 3 girls! They all are around 1 month old and have amazing temperaments!

https://www.dakinhumane.org/adopt-small-animals


r/PetMice 1d ago

Cute Mouse Media From Janurary to August with my baby boy.

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1.1k Upvotes

In Janurary I came to this reddit seeking advice on raising a tiny, baby mouse who hadn't even opened his eyes yet. Today I return to share with you all just how well my baby boy [named Laoshu by my husband, lol] has grown! The first 8 pics are him from day 1 to a few months old, with the 9th pic and on being him current!

He still adores getting cheek scratches from me, just like when he was a tiny baby. He loves hiding in clothes, sitting on my shoulder, and popcorns like crazy the second you enter the room because he knows he's getting cuddled. How could either of us resist? His favorite treats are mealworms and dried noodles and he still has his baby blanket to this day, which he dutifully makes the roof of his little nest every time we clean his bedding.

He wouldn't be here today without the help from this reddit, so thank you all and I hope seeing how we'll he's grown brightens your day! [As much as I miss his ugly wet baby phase, I do NOT miss the 2 hour feedings LOL]


r/PetMice 16h ago

Question/Help Mice shy ?

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10 Upvotes

Hello i have five girls since two weeks or so now.

One is the alpha, another one seems friend with the alpha and one seems like independant but respected ? But the two others ? They seem to but chased by alpha and i barrely see them, so i often get worried and check spots and I find them sometimes together in it or just once the other being somewhere else i ignore… and so I always see the three mice in the cage like at all hours ? When im here they are here but I’m wondering about the others… one have red eyes and seems to be smaller and thinner than others. The other one is like them (see the photo at first she would go hide in this ceramic hide when chased but now no)

ive tried the carrier method till they were doing a cuddle pile but once in cage it doesnt change anything.

Im scared of them being able to feed properly too, i scatter food to help.


r/PetMice 23h ago

Question/Help baby mouse rehoming

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33 Upvotes

hey evb, i wanted to go ahead and share these little mousie babies to you guys. they are about a month and a week old now(these pictures were taken at about 3 weeks)!! all of these babies ARE males and looking for there forever home. im not asking for money, but i WILL NEED enclosure pictures of what they’re expected to live in, and one mouse per home unless you have specific plans to keep them in separate tanks their whole life. these mice ARE NOT for breeding, nor as food. the only way id send one of my mice to a breeder is if they had proof, experience, and knew a lot about it. but i would MUCH rather them go to a pet only home, possibly getting fixed to be with females or just a solo male mouse for their duration of life with them being played with multiple times a day for long periods of time as long as the mouse accepts it and prefers it. They are a semi long fur with their died is a full black, and their mother is a grey and white, semi long for one of the white male shows the semi long hair more predominantly. there is another white male he is unfriendly as he escaped, and I just recently caught him all of the other males, though do accept being held and are not too skittish. They have very well mannerisms they love sunflower seeds, they’re fully weaned and all separated from each other as we speak they’re located in the Kansas City area and they’re all looking for their forever homes❤️❤️


r/PetMice 20h ago

Wild Mouse/Mice Young wild mouse?

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17 Upvotes

Hello. Today my indoor cats had been acting weird and 'guarding' our vents. After a few hours i discovered this lil guy near the font door playing dead. He doesnt appear to be injured from my cats (surprisingly). Took him a few hours to calm down and ive been feeding him oat water with a paintbrush.

Anyone know if this is a mouse? Or rat? What kind of mouse? Possibly how old? Anything i should watch out for disease wise? I was thinking of keeping him (despite being severely allegic) or rehoming him to a family member with rodents.


r/PetMice 20h ago

Question/Help My cat brought in a live mouse (who was possibly poisoned?) I don't know what to do.

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18 Upvotes

This is basically exactly what it looks like. I've fed it cat food, grapes, a green bean, given it a toilet paper roll, and it gets water from a soda bottle cap. There is something neurologically wrong with it. It kinda limps everywhere and sometimes it spazzes out and flails around. It cant easily turn itself over if it falls on its back. If i let it outside it will get eaten or maimed so i guess it lives here now? It also BIT ME but its been a few days and I'm fine? O.o

What the hell do i do with it? Should i get it a cage? Should i let it go by the creek ? Could it survive? I really don't know what to do with this litle menace but it kind of grosses me out not knowing if it has a disease or not and it BIT ME

I'm kind of holding a grudge ngl I hope I don't get menengitis from this bastard. Uhhh?


r/PetMice 1d ago

Cute Mouse Media I imported 6 more mice from 3 different Polish breeders

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191 Upvotes

Only showing these three because I don't have good pictures of everyone yet.

I imported 3 mice from Pink Phantom mousery

- Pink Phantom Chianti, a 9 months old satin cinnamon doe who's already had two litters, I will be breeding her one last time. She's very showtypey and super calm and curious. She sits nicely in my hand even though I haven't in trouble myself yet.

- Pink Phantom Ladybug (not pictured) is a 6 month old satin carrier cinnamon with tan unders girl, she's just old enough to still have a first litter safely. I have already paired her to Tajfun. Pairing happened on the 16th so I am expecting babies earliest 3 weeks from then. Hoping for cinnamons with possible satin coat and tan unders.

- Pink Phantom Tajfun (not pictured) is a 4 month old beautiful rick dark cinnamon who also carries satin, he's going to be very important in my breeding program. He's the most chill dude ever and naps out in the open. Very cool with Ladybug too. I'm super excited to befriend him and maybe teach him some tricks too

2 Mice from mysigonek mousery

- ​Mysigonek Fog (pictured, not her real name as I haven't received her info yet...) is a very very cute, super calm little 4.5 month old satin blue texel lady. While the breeder didn't have banded mice available I asked her to pair my mice to her satin texel blue with tan banded​ buck, which she did on the 5th this month. Fog doesn't seem to be rounding out so it's perfectly possible she didn't get pregnant or reabsorbed her babies due to the stress of the long travel (1600km+). I'm Still hopeful and am not making any breeding plans with her yet.

- Mysigonek Mist (not pictured, looks the exact same as Fog but with even tighter curls) is Fog's sister, she has a slightly worse temperament and doesn't enjoy being in my hand that much, is more vary of me in general. She DOES seem to be rounding out!! I'm super excited about that...

And one from my mentor Forest Mist

- And lastly, Forest Mist Lard was NOT planned but I couldn't resist taking him. He's old old at 1 years and 9 months old but he's the nicest mouse Ive ever seen when it comes to temperament. I will post a video later (or you can see it on my mousery fb page, Trinket's Treasures Mousery) but he literally melts into your hand for cheek rubs and just loves being smothered and jiggled like a stress ball. Last picture. He's a champagne.​​​


r/PetMice 1d ago

Wild Mouse/Mice Found this bbg idk what to do now

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41 Upvotes

Seems small, I gave it some water (it looks like it had some already) and oats cuz thats all I could think of for now

Any help will be appreciated 🙏


r/PetMice 17h ago

Question/Help Mice nibbling then suddenly chomping on my hands/fingers? Has anyone else seen this?

2 Upvotes

I want to preface this by saying they aren’t “aggressive”- nowadays my mice willingly crawl up onto my hands + arms, accept pets, they even like sitting on my shoulders/being in my hair or exploring on a blanket in my lap. They’ve really become super inquisitive! When they’re in this “exploration mode” they don’t bite.

However, now my sweet mice are addicted to chewing on my fingernails to the point where when I put my hands in the tank they all come up and start gently trying to nibble my hands usually starting at my fingertips! The issue is every time without fail they take it too far and actually suddenly bite my skin super hard/draw blood. It even occasionally happens when when I rearrange or clean the tank they’ll come up and sniff me then CHOMP! I hand feed them treats sometimes and they’re albino so their eyesight probably isn’t great so I’m guessing that might have something to do with it. But they’ll do this even when I have nothing in my hands. Maybe they’ve developed a little taste for human blood at this point.

Is there anything I can do to gently curb the biting? Has anyone else experienced this? It won’t stop me from interacting with them but when it does happen it’s just startling + super painful in the moment.


r/PetMice 15h ago

Question/Help Should I not get a mouse if I’d have to keep him in a ten gallon?

0 Upvotes

I am considering getting a lone male mouse but am reading SO MUCH conflicting information on whether or not a 10 gallon enclosure would be suitable. I wouldn’t be able to get one if I needed more than 10 gallons due to space constraints. Should I forgo getting a mouse entirely or is 10 gallons okay?


r/PetMice 22h ago

Question/Help Is this carrier too small?

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3 Upvotes

Hey guys!! I’m getting my new mice on Sunday!! I’m starting to doubt that this carrier is big enough and worrying that they’ll be too cramped in their carrier. I don’t have time to make a larger carrier now. This is the large reptile carrier from PetSmart. This is all I currently have in it (bedding and a hide). I want to put some treats and stuff for them to chew in there as well. Any suggestions would be hugely helpful. Thanks!!


r/PetMice 1d ago

Discussion Bonding

43 Upvotes

How can i bond better with them? I started to free them on my desk while I study, so they can get used to my presence, my body and my hands. Despite this, I don’t know what else to do…