Pet Mice - Fancy Mice

Family: Muridae Picture of Dora, a Pet Mouse, Fancy Mice Pictures"Dora the Mouse"Mus musculusPhoto © Animal-World: Courtesy David Brough
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my two little mice have become addicted to sweetmeats (originally offered once a day) and begs and screams all the time for more.they have become aggressive and... (more)  ananya roy

   Mice continue to be one of the most popular "pocket pets", a term used with small pets that will fit into your pocket! 

   Mice are great pets for several reasons. They are small, inexpensive, and very easy to care for. They are very clean animals that continually groom themselves by licking and combing their fur. Female mice are odorless. If they are well taken care of and handled often they can become very tame and enjoyable. They are a great first pet for children.

   Dr. Jungles says..."this is the perfect pocket pet!"

"Dora" is a Common mouse, and a great Pocket Pet!
"Dora" Photo © Animal-World

  Mice are the smallest mammals to ever be domesticated, and mouse breeding is an ancient hobby. The common mouse is a curious little creature that makes a very interesting companion. (They are also very cute!). They have a life span of 1 to 3 years.

   They not only captivate our imagination but mice play a very important part in history as well. One of our favorite mice is Mickey Mouse who has delighted us since the late 1920's.

   The mouse is a very adaptable creature who can thrive in almost any environment and has resisted mans' attempts to eradicate it for centuries. Mankind has learned a lot from studying mice and using them in a variety of situations to determine what would happen to people in the same situation. They are not only interesting, but educational!

For information about Small Animals and their care visit:
Guide to a Happy, Healthy Small Animal

Geographic Distribution
Mus musculus
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Data provided by
  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Mammalia
  • Order: Rodentia
  • Family: Muridae
  • Genus: Mus
  • Species: musculus

Scientific name:

Mus musculus - House Mice
Mus sylvaticus - Field Mice
Mus minutus - Harvest Mice
Mus musculus domesticus -
 are the "Pet Mice" or "Fancy Mice"


   House Mice originated in the central and southern parts of Asia, but are very adaptable and have spread all over the world. The Pet Mice or Fancy Mice are domesticated forms of the House Mice.
   In Europe and Asia people began to exchanged mice for their fur and coloring in the 1800's and the term "fancy mice" came into use. In about 1900, Walter Maxey and other mouse fanciers formed the National Mouse Club in England and "fancy mice" have since been kept and bred as a pet.

   Mice have been used for many purposes over many centuries. The word "mouse" comes from a 4,000 year old word 'mush' which means 'to steal'. In the orient, mice were used by the Chinese in religious rituals as early as 1100 B.C., referring to them as the "ancient one", while the Japanese believed them to be a messenger from the gods. Greeks used them to predict the future and even worshipped them, sailors and miners used them to test air quality in submarines and mines, science uses them to study genetics and disease, and they have even been sent to outer space.


   Mice weigh on average 1 ounce and are approximately 2.5 to 3.5 inches long (without the tail).
   The fancy mice or pet mice are a domesticated form of the wild house mouse, of which there are a number of different subspecies. Today there are many different varieties of pet mice or fancy mice. The most common domestic mice are the white albino ones which were (and still are) used in laboratories.
   Various other mice strains have been developed in laboratories from inbreeding. These various strains will have individual characteristics such as being a more long lived mouse, or one that tends to develop more tumors, or needs a specialized diet, as well as other traits such as being more temperamental, more nippy, or more flighty.

   There are some unique strains of mice!
One is known as the "waltzing" or "shaker" mice, or sometimes the "Japanese" mice as they were first recognized in Japan. These mice are defective in their balancing ability and appear to "waltz" rather than move about as normal mice do. Another is the "singing" mice that make a faint twittering sound that is distinct from other mice and makes us think of singing.

   Pet mice are available in several colors and patterns due to specialized breeding by mouse hobbyists. Actually there are more than 70O color and coat varieties. Coats can be smooth, curly, longhaired or even a combination of these. The most usual color variations include brown, black, tan, gray and albino with both lighter and darker shades of these as well.


   There are many different cages available for keeping mice as pets. One of the best kind is a glass terrarium with a wire top. When considering where to put your mouse cage, think about what problems could arise by putting it in different places. You should’t put it directly in front of a window, as sunlight tends to annoy mice and make them very uncomfortable. You also should’t put it where drafts are, because this also could result in sickness. Keep it up on on a table or stand where it won't be easy to knock over, but where people will be able to readily reach and view it.
   Make sure they have a good soft bedding of wood shavings or prepared litter. Corncob bedding obtained at pet stores works well as do beddings made of recycled paper and cardboard. Wood beddings provided by most major suppliers are simply kiln dried natural wood products. Generally it is best to not use beddings with additives. Chlorophyll bedding has chlorophyll added to give it a clean, fresh aroma. It is green and so not recommended for white small animals as it will discolor their fur. Wood shavings should be used in cages that are open with good ventilation, rather than enclosed containers. Cedar shavings should be avoided as it is more aromatic and there is concern by some that this or possibly the natural resins in cedar may be harmful. Some small animals can develop allergies due to the dust in moldy hay or in bedding.
   Mice are nest builders and will make nests from their bedding to sleep in and have babies in.
   For water, you can use a water bottle with a hanger that allows mice to get water whenever they are thirsty.
   Clean cages thoroughly with hot water at least once a week and change the bedding at least twice weekly.

Care and feeding:

   Mice need a completely balanced diet. This includes carbohydrates (whole oats, hay, stale bread), vegetables (lettuce, carrots, peas, etc), and protein (such as dog biscuits). An easy way to feed mice is to get the formulated mouse foods available at pet stores, which have all the vitamins and minerals that mice need.
   Mice do enjoy treats, and things such as fresh vegetables, sunflower seeds, cheese, jam, and fruit and grain bars from pet stores will be much appreciated. Feed them once a day in a small china or pottery dish and remove any uneaten fresh food at the end of the day. Clean the food dish thoroughly with hot water at least twice weekly.
   Mice also have constantly growing teeth, and so should be provided with something to chew on to keep them in good chewing condition. Hard nuts, such as acorns and walnuts work, and also flavored wood sticks from pet stores. Make sure that mice have a constant supply of water. Commercial water bottles are probably the best choice.

Social Behaviors:

   Mice are very sociable creatures and like to have company. One mouse can do fine as a pet, but they appreciate having friends of their own kind as well. Most mice get along fine with each other, but you should watch out putting males together (unless they grew up together), because they will tend to fight, especially if females are present. Usually females can be put together with no ill effects.
   Mice are great with children, but they should be kept away from the other pets of the house (dogs, cats, birds). They should also be kept away from other rodents such as rats, because rats are their natural predators.

Handling and Training:

   Mice generally become tame pretty quickly and are easy to handle and hold. The best way to pick them up is to grab the middle of their tail gently and then place them in the palm of your other hand. If they are very familiar with you, you can pick them up directly.
   Mice can be taught simple tricks, such as taking food from your fingers once they are comfortable with you and even retrieving treats from your pocket. With lots of patience, they can learn even more sophisticated things such as climbing ladders, walking "tightropes", racing, and traveling through mazes. Of course, one of the best ways to train them to do simple tricks is to reward them with a treat every time they do something right.

Activities - Exercise and Play:

   Nocturnal by nature, mice usually spend more time sleeping during the day than at night.
   They are extremely active and love to exercise and play. Exercise wheels are great for mice because they will occupy their time and keep them healthy. You can purchase or make tubes, ladders, and climbing blocks also.
   Mice also like to chew. Not only is this beneficial to keep their always growing teeth trimmed down, it is a favorite activity. Be sure they have plenty of chews, sticks and twigs.
   They also like to hide, so giving them cardboard boxes or nest boxes will give them a place to go when they want to sleep. Of course they will probably also chew up their boxes, so be sure to replace them from time to time.
   Mice will spend quite a bit of their time sleeping!


   If you are planning on breeding your mice, then you should get some nesting material to put in one corner of the cage. This can usually consist of something like grass or hay. You should have one male in the cage - no more! If there is more than one male mouse in a cage, then they tend to fight. There can be as many females as you like as they always get along with each other and will actually help take care of all the babies, not just their own.
   Female mice reach sexual maturity at about 6 weeks old, and males take a week or two longer. Females can have up to 15 litters a year, and can become pregnant within 24 hours after giving birth. So if you don't want more babies immediately after the first litter, it can be a good idea to remove the males. However, males can be kept with the females after the babies are born as they will not harm the young (and often actually help to babysit!).
   When baby mice are born they are deaf, naked, and blind. Within two weeks the babies will look just like their parents, just smaller. They may be weaned in approximately five to six weeks.


   Mice are hardy resilient animals and rarely get sick. However, if not taken care of properly they can become ill. Most ailments are preventable simply from taking proper care of the animal.
   Signs that your mouse is sick include such things as not eating/losing weight, dull coat, runny eyes and nose, and huddling in a corner not appearing active. In general, if you notice your mouse is sick make sure to completely clean and disinfect the cage and change the bedding. Make sure it has plenty of food and water and isn't in drafts or damp conditions.
      Respiratory Infections/pneumonia: The indications that your mouse has a respiratory infection or even pneumonia are runny nose, lack of appetite, inactivity, weight los,and labored breathing. Respiratory Infections are generally caused from being in drafts and/or damp bedding. Make sure he is taken out of drafts and the cage is completely clean and dry, and place a dry cloth over the cage. Pneumonia will require an antibiotic therapy, and possibly a visit to a veterinarian.
      Asthma: This is usually attributed to an allergic reaction to dust, especially the dust of moldy hay. Provide a clean dry environment, and always replace damp hay and beddings.
      Fits: Sometimes a mouse is prone to fits, where it dashes around in circles until it falls down exhausted. There is no apparent reason for this and no known treatment.
      Diarrhea: If your mouse has watery droppings and appears to have diarrhea, then the cause is most likely from having too many fresh greens and fruits. The simple remedy to this is to remove them completely and not feed the fresh foods at all for a few days until he appears to be getting better. Then slowly re-introduce fresh food every few days.
      Mites/lice/parasites: Generally dirty conditions may provide breeding places for these types of pests so make sure and provide a dry, clean environment. Completely clean and disinfect the cage. Mites are especially harmful to mice and will cause a loss of fur and encrustation of the skin. Many blood sucking parasites can be eliminated with special powders available from a veterinarian or pet store.
      Skin Diseases: These are fungal diseases where there are small areas of hair loss and scalyness. Generally this condition is contracted from children who have ringworm. It is best to go to a veterinarian for this.
      Ear Infections: Often indicated by a mouse walking in circles or with its head tilted. This is usually caused by an inner ear infection or by parasites. A drop of mineral oil on a cotton swab will work to wipe the ear and may provide some relief. See a veterinarian to determine the cause and for treatment.
      Cancer(tumors): The most common form of cancer is mammary tumors. These are generally attributed to old age or viral infections. Keep your pet as comfortable as possible and provide the best nutrition possible.

Availability/Purchasing your Mouse:

   Pet mice are readily available.
   When purchasing your mouse, you should look for an overall healthy appearance and alertness. It should have a long body and clean head, smooth and not bumpy, and should arch a little over the loins. The fur should be sleek and smooth. It should have large bold eyes and ears that stand erect and be scoop shaped. The tail should be as long as the body, wide at the base and tapering to the end with no kinks.

Lastest Animal Stories on Pet Mouse

ananya roy - 2012-12-02
my two little mice have become addicted to sweetmeats (originally offered once a day) and begs and screams all the time for more.they have become aggressive and even bit me and my mom. to sooth them we have given them lots of sweets and now they have become very fat and bulky.they do not exercise in their wheel, all they do is sleep and sleep. so when we decided not to give them sweets anymore, they have become increasingly violent and are screaming and biting at everyone who puts hand in their cage. how can i improve the situation?

  • Fennel - 2012-12-28
    If you slowly let off of the sweets that should make them less aggressive and while your doing that mix less and less sweets with good nutritional food! I hope this was helpful! :)
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Alivia - 2008-05-27
I've had mice for a long time now. I recommend them as pets for someone who doesn't have much space, and wants a pet that is cheap. Mice can be a great starter pet for children that are mature enough to understand the fragility of such a small animal. I work in a petshop and see a lot of mice come and go every day, they're wonderful pets if you are willing to spend time playing with and taming them. Each of the mice have been handled daily from birth and are so friendly they run up and sit on my hand when I put it in their tank. I keep both boys and girls separately, but I recommend that you only own mice of one gender even if you keep them separatley unless you are intending to breed. No matter how careful you are, accidents do happen. If you're looking at getting pet mice, the best thing to buy is a tank with a secure lid, as long as there is plenty of ventilation. Paper cat litter or Carefresh are great bedding for a mice tank, but I add shredded paper and unscented tissues to their houses and nestboxes so they can have a comfy bed. My boy Aslan tears up his tissues and makes a huge nest he sleeps in the middle of, it's extremley cute (: An important thing to realise is that female mice especially may contract tumours, when this happens there is very little you can do besides having them put to sleep humanely at the vet's when the tumour begins to impend their movement. This happened to my little girl Esme a few months ago, and though it was very upsetting, I'm glad her life ended before she had to suffer. I breed my mice ethically occasionally to sell at the petshop where I work when we are low in supply, this way I can meet the owner's of their future homes. The only way I will sell one of my babies is if I believe the person will honestly care for that mouse as well as I would, because they are taken care of very well at home.

  • Meghan Dietz - 2014-05-18
    Yes, I have a mouse named Rosie. I like your care sheet! (Whatever you call what you wrote) And I agree completely on your information on how you care for your mice. I enjoy the mouse that lives in my room, and being 12 years old, I know quite a bit about these wonderful rodents. Ask any questions! I can answer them, I'm always on this site for information about all kinds of favorite animals! Thanks for reading! You're totally awesome about mouse facts! :) =) :P
terry - 2005-11-02
Your site is very helpful and complete. Thanks for the guidance on how to take care of my mice properly. I did not buy these mice. Against my advice, my daughter bought a female white mouse and she just loved it. I thought she was crazy, but by the time she went to college a year later, they became my mice. She had five mice left from a liter of 13, born of her white mouse! Anyway, I am crazy about these little gals. I was home with a back injury and was not very mobile. The mice gave me entertainment, wonder and fun. I told everyone that made fun of me and my mice that they were great pet therapy. I just love them. I find them so much fun. I love finding new things to put in their cage to challenge them. They are very curious so this suits their demeanor very nicely. They seem to enjoy new items which they investigate thoroughly by climbing, nibbling and moving the object around. Yogurt containers with windows cut into the side and top are one of their favortie toys. They like the little compartment to sleep in or just to sit in and watch out the windows. Blocks of wood, a ramp of thin wood, a plastic shelf with legs to go in a small kitchen cabinet makes a great platform for them. I cut off the top of a cranberry juice bottle, removed the cap, cut some holes in the four sides, at different heights and different sizes to make a little gym for them. These are some of their favorite toys. These mice are so easy to care for as long as you find a good litter for the bottom of the tank, and have the patience to handle them and make friends with them. After many tries we have finally found a litter for small animals that looks like a light beige kitty litter, and that has kept the smell down to nothing. I recommend mice for young people and old people. I think they would be a lovely pet for a housebound older person. Having life in the house to watch and enjoy is such a blessing. Thanks again.

Da T - 2003-10-29
I have found that mice make great pets because you can take them almost anywhere. I travel with my mice all of the time and they seem to enjoy the adventures that we have.
Some good treats I have found for my mice are cheerios and grapes. As for bedding, I have never tried pine, but they seem to like aspen a lot.
Thanks for the tips!

Olivia - 2008-12-01
I got my first mouse in third grade after I saw a TV special on pet mice. His name was Scamper and he was by far one of the best small pets I've ever owned. I loved him so much, I got another little mouse named Squeakers from the same pet shop. They were my two little buddies, and I had Scamper until fourth grade and Squeakers until fifth. I then got hamsters, but I still prefer mice much more. They are the best types of small pets you could ever ask for! My mice never bit me, they always loved a little scratch behind their tiny ears, and they were my best friends. No matter what, I highly recommend mice as pets for children. I'm now in eighth grade and I'm planning on getting my seventh mouse. If you want a small, easy-care pet for a child, I'd recommend mice in a heartbeat.

Page - 2008-01-26
I've always loved mice since I was a child. I found my first nest of wild baby mice in my uncles barn in the glove box of an old car being stored there. They were so tiny, pink, and delicate. Thankfully their mother had them safely hidden from the farm cats (though my Uncle wasn't so pleased to have mice in his barn). Years later I bought a white mouse at a pet shop. She had a short, shiny, silky coat, and was just weaned from her momma. I took her home, named her Twinky, and kept her in a 10 gallon aquarium with a mouse wheel (for exercise), a tiny coconut nest(with a hole drilled in it for sleeping during the day), cotton critter bedding material (to sleep on in the coconut), well cleaned grape vines (for climbing on), dust free wood shavings (for the tank floor), a tiny bell shaped bell on a thin piece of wire hanging from the tank lid (for her to play with), 2 tiny ceramic dishes (for water and food), and a plexyglass lid (which I drilled tiny air hole in and glued a handle on - as mice can get their tiny claws/toes ripped out when a screen aquariun lid is used). Her main diet was freshparakeet seeds (a fresh tablespoon a day), and sprouted and well rinsed parakeet seeds (1/2 to 1 teaspoon a day) Sprouting seeds shows you if the seeds are fresh or too dried on the insides to have any food value (animals and birds that eat dried out seeds will end up slowly starving to death and you won't know why). Treats were a sunflower seed, 1/2 of a raw peanut, a pea sized piece of cooked sweet potato, or a pea sized piece of apple (2 pieces of any of these treat foods, in these serving sizes, are plenty per day - remember, fat mice have short lives). I kept a small pet mineral stone in her cage for her to lick, a small pieces of deer antler for her to gnaw on, pieces of small animal chew sticks for her to chew, and I used ferret cage sanitizer to clean the inside of her cage once a week (making sure to clean any sanitizer residue off the inside of the cage) also used it to sterilze my hands before and after holding her. I took her out of her cage to play, exercise, and explore ever evening for several hours (mice will develop arthritis and nerve disorders if kept in a cage constantly). She loved having her ears and chin gently stroked (after she calmed down from exploring) a sure sign she was ready to be put back in her cage. She lived to the ripe old age of 3 1/2 (almost 4) years (old for a mouse)and never once bit me. She was a sweetheart!


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