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Pet Mice - Fancy Mice

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"Dora the Mouse"Mus musculusPhoto © Animal-World: Courtesy David Brough

     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!"

   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

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

Background:      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.

Description:      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.

Environment:      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!

Breeding/Reproduction:      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.

Ailments/Treatments:      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.

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Ok, I woke up this morning and my mouse was just sitting in her tube, which she never does. So I took her out of it snd she started to scratch + lick her butt, another thing she doesn't do. So I took a look, and her butt is very swollen, bleeding, and scabby. I put a dab of mineral oil on it earlier, but it doesn't seem to help. If you can please reply, that would be great! thanks, -- Emily <3 Emily 2010-02-03
HELP! my fat mouse Patches suddenly is having diarrea and crust in her eyes. she looks depressed and is always lying down in a corner. i have no idea what is wrong with her. i recently changed her diet from petco mouse treats to normal mouse pellets and moved her to a new cage. i did this before with my other mice but she is the only one with problems. what is wrong with her? Olopy 2010-01-14
Hi my beatiful Siberian Husky puppy Sasha and me went out for a walk last night and she picked up in her mouth two baby mice. I took them to the pet store to ask some questions about them and the guy said I could keep them, and already my female girl is peregnant. :) SO EXCITED FOR THE BABIES TO COME!! :) Boy Mouse: Orange with white spots. His name is Cheese Girl Mouse: Grey and . White with black shadow. Her name is Linsey Husky Puppy: Pure White. Her name is Natasha a.k.a Sasha Shannon 2009-12-28
My mouse Marny died this Saturday before I went to my friends place. I looked in to the mouse cage and I saw that she died. Today, me, Nathy, and mummy buried her body in the ground and we put her in a box to be safe and she's next to Sqirter, Nathye's bird. Marny has a sister called Splindora. We give her lots of cuddles, we check on her lots of times, Marny was black and white. The whole family loved her and no-one will ever take her place in our hearts. Emily Wood 2009-11-28
My mouse, Skitz, is sick. I picked him up today and he was so cold I thought he was dead. He started moving though, but I noticed he was shaking a lot. I held him for a while and tried to cover him up with my hands and breathe hot air on him for a while. He started moving some more, so I put him back into his cage so he could eat. At first he didn't seem to want it and he was walking oddly. He was sort of wobbling and hopping, but the hopping is normal, that's how he got his name. Eventually he started eating and now I have the heater blowing in his direction. Does anyone know what might be wrong with him? I read the sickness' above and the only thing I can come up with is maybe a respiratory infection. I'm really worried about him. Tamera 2009-11-19
Some of the coolest comments:
I've been reading some of the posts where people had found stray mice. I too, found a white mouse with tan spots in my backyard. Actually, my cat found her first, then my dog saw it and they were both tormenting it. The little mouse wasn't running away, just looking at them looking confused. I intervened and took her in the house. Fortunately, I had a spare 10 gallon aquarium to put her in. I thought it was odd to find a mouse, but then I remembered that my neighbors have a Python, so maybe she escaped from it too! It's been about 3 months and she seems very happy except for an occasional "asthma" attack. (I don't know for sure if it's asthma, but she occasionally has trouble breathing for about a 1/2 hour and then she's fine; never symptomatic long enough to take her the vet). She's a finicky mouse, she refuses to eat commercial mouse/rat food. I have to give her different types of cereals, oatmeal, dried/fresh fruit, fresh greens, pumpkin seeds and sometimes a bit of her favorite - Cheese! (It's not a myth, mice do like cheese!) I never would have gone out and purchased a mouse for a pet, but she is very sweet and I'm so glad I found her! Stephanie Fleming 2009-10-02
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. Olivia 2008-12-01
Comments Dr Jungle REALLY Likes to Hear!
Growing up I've only had cats and dogs as pets. For the first time in my life, I live alone and realized that my cat was too big for my tiny studio apartment. So I sent him off to a good home with an elderly woman in the country. But I began to miss the companionship, there'd be no one waiting for me when I got home. So, the other day I finally decided to go to the pet store. I thought I'd just get a fish, but when I got there and looked around, the mice were just asking me to play! That day, I ended up going home with 2 beautiful mice! I named them betty and billie after betty davis and billie holliday. Betty is really spunky - she caught my eye at the pet store because she has long hair and curly whiskers and looks like she needs her hair brushed all the time. Betty also was already so social. She never runs away when I go to pick her up and she'll just hang out on my lap and not try to run. I'm still working with billie to get her used to me trying to pick her up and play with her. The advice above seems like great advice, and I can't wait to try and see if it works. I don't think I would have been nearly as happy with a fish. Melanie Kasten 2010-01-21
I love this site. It is really helping me with my science fair project with my mouse, Bear. I put an odometer on his running wheel to measure his activity during day and night, then record it. This site is very informational on mouse history and facts in general. Bear and I just love it! Thanks for the info. Matt 2009-12-03
I have two mice now: Clover and Sunny. Tumbleweed just recently went back to the earth so I have been feeling a little down. I noticed Clover's eye have been pinched shut and a little glossy. They are worse today than yesterday and I came to this site to see if there is anything that could help me help her. Thank you so much for the info. Rebecca 2009-11-01

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