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    What Sex Is My Guinea Pig?

    Knowing what sex your guinea pig is can be tricky to identify. This article shares some helpful information that can help you sex your guinea pig.

    What sex is my guinea pig

    What sex is my guinea pig What sex is my guinea pig

    Guinea pigs can be sexed by examining their genital region both visually and physically. To begin, carefully grab your guinea pig from its hutch and position it calmly on its back.

    Male guinea pigs

    In male guinea pigs, the testicles and scrotal pouches are often readily identified. But Dr Dharshinee Rajkumar from Greencross Vets Box Hill has the following tip in case your eyesight isn’t very good.

    “Applying slight pressure just above the genital area will extrude the penis. Visually, the genital area in a male guinea pig resembles an ‘i’ shape,” Dr Rajkumar says.

    Female guinea pigs

    Female guinea pig genitalia tend to resemble a ‘Y’ shaped depression. However Dr Rajkumar warns that females sometimes look like a male because of swelling in the area where the penis should be found.

    “Gently parting the genital opening will reveal a ‘Y’ shaped opening in a female guinea pig,” advises Dr Rajkumar.

    Why is it so important to figure it out early?

    Guinea pigs mate and reproduce from as young as eight weeks old, and they’ll do so with their siblings. Hence why it’s so important to separate the males from the females from about four weeks.

    Typically, guinea pigs produce between three to four pups, but it’s not uncommon to have up to eight pups in a litter.

    In addition to having to re-home more guinea pigs, sows can experience life threatening difficulties giving birth, as well as vitamin C deficiency and mastitis.

    “Not identifying genders early will result in unwanted litters and could lead to losing your pet,” says Dr Rajkumar.

    So if in doubt, visit your local Greencross Vets , where you can also discuss desexing . For more tips, read Petbarn’s guinea pig care guide and also their maintenance guide.

    Other related pages:

    Guinea Pig Dental Care

    Rabbit and Guinea Pig Dental Care

    Rabbit and guinea pig health care


    Source : www.greencrossvets.com.au

    Male vs. Female Guinea Pigs – GuineaDad

    Male guinea pigs are called boars, while female guinea pigs are called sows. Below is a diagram that that helps tell boars and sows apart.


    Male vs. Female Guinea Pigs

    Like most mammals, female and male guinea pigs have natural differences. Both can make amazing companions when cared for properly, but the differences influences by their sex can still be impactful. Understanding the differences between male and female guinea pigs is important, especially since procedures to remove the sexual organs of guinea pigs are less common than they are for cats and dogs.

    Understanding your guinea pigs hormonally influences behaviors can have a significant impact on their quality of life, so here is everything you need to know about the distinct differences between make and female guinea pigs.

    How to Tell a Male Guinea Pig From a Female

    From above, male and female guinea pigs have no notable sexually dimorphic traits. On average, male guinea pigs tend to be slightly larger than their female counterparts, but a few ounces difference in weight is not a conclusive measure of sex. To properly determine the sex of a guinea pig, their reproductive organs have to be assessed.

    Guinea pigs are compact animals that develop with age and dislike being flipped over. These factors make it difficult to judge a guinea pig’s sex, especially in young or long-haired animals. It is easiest to determine the sex of an adult intact short-haired male guinea pig, as their testicles are generally visible behind their rear legs. If these two distinct oval protrusions are not visible, the guinea pig will have to be held up or flipped over to be assessed.

    Be very gentle with guinea pigs while doing this, and know what you are looking for ahead of time to minimize how long they have to stay still. A female guinea pig will have a genital area that resembles a “Y” shape while males have more of an “i” shape. The dot on the “i” is the penis, and you can confirm your guinea pig is male by applying slight pressure above the genitals. If the dot sticks out further, you can be fairly confident you have a male.

    Guinea Pig Social Differences

    One of the main reasons why it is important to positively identify the gender of guinea pigs is to provide them with a suitable social group. Guinea pigs are very social, but their companion preferences are influenced by their sex, and so are their chances of having babies.

    In the wild, guinea pigs have complex social structures, and you may be surprised to find that all-female groups are unlikely. Female-only groups tend to lead to conflicts and generally require at least one male to maintain a proper social structure. It has also been found that female guinea pigs prefer a male bonding partner, and this partnership can reduce stress levels for both individuals. Although female only groups bicker a lot, they tend to have less fallouts and fights than all male groups. Male guinea pigs tend to be more territorial. Always be sure to provide enough space and hideys in their cage to prevent guinea pig fights from occurring regardless of sex.

    The challenge then becomes preventing unwanted breeding, which is often done by neutering the male. A neutered male has less testosterone. This is important because it reduces their chances of displaying territorial, dominant, or female guarding behavior with other males. Although this builds a social structure, neutering guinea pigs can be very dangerous. If a guinea pig parent prefers to have both male and female guinea pigs, we always recommend they be separated in different guinea pig cages.

    Influences on Personality

    The personality of a guinea pig when it interacts with people is dependent on a number of factors, sex included. When hormones are considered, male guinea pigs are expected to be the less skittish sex, especially if they are not neutered. Heightened testosterone levels are known to make most mammals seem more extraverted as they seek to dominate or stand their ground in social situations.

    This does not mean that every male guinea pig will be naturally outgoing and every female will be timid. Personality is influenced by genetics outside of sex hormones and life experiences from a young age, so it is best to learn your guinea pig’s personality by spending time with them. If you socialize any guinea pig properly and carefully desensitize them to human interactions, they can be a loveable companion.

    Diet and Health Differences

    Male and female guinea pigs can share food supplies since they require the same nutrients in quantities that are more influenced by their body weight than their sex. There is, however, one major exception.

    Source : guineadad.com

    How to Determine the Sex of a Guinea Pig: 8 Steps (with Pictures)

    Many pet owners have difficulty determining the sex of their guinea pig, especially in newborn guinea pigs. Identifying the sex of your guinea pig can help you to prevent unplanned pregnancy if you introduce another guinea pig into the mix...


    How to Determine the Sex of a Guinea Pig

    Co-authored by Pippa Elliott, MRCVS

    Last Updated: February 23, 2022 Approved

    Download Article

    Many pet owners have difficulty determining the sex of their guinea pig, especially in newborn guinea pigs.[1] Identifying the sex of your guinea pig can help you to prevent unplanned pregnancy if you introduce another guinea pig into the mix and let you know if you'll need to separate a baby from its mother.[2] Though many vets offer sexing services for guinea pigs, you can also determine the sex of your guinea pig on your own.

    Part 1 Part 1 of 2:

    Examining the Guinea Pig


    Be careful when examining very young cavies. Newborn cavies can become distressed when away from their mothers, and they are much more delicate. They also get cold easily, so when you examine them, do so in a warm area and try to be as fast as possible.

    It can be extremely difficult to determine the sex of a very young guinea pig. You can wait until the guinea pig is 2-3 weeks old to sex it, at which time it is easier to determine the sex [3] . However, since males must be separated from their mothers and sisters at 3 weeks old, it is crucial to sex them by this time. Otherwise, they can impregnate their mothers and sisters.

    Don't worry about handling young guinea pigs. Their mother will not reject them and early handling can help make them less afraid of humans. [4]


    Wash your hands before and after handling. Guinea pigs can carry diseases that infect humans and they can be affected by things on your hands (hand sanitizer, lotion, etc.), so it is important to wash your hands often.

    Don't worry about wearing gloves. Very few human diseases can be given to guinea pigs and they do little to stop diseases from spreading from pig to pig.



    Perform the exam on a low, stable service. Cavies are often squeamish about being picked up and held in place for a long period of time. Put a soft, clean towel on a low, stable service, like a low table or the floor in preparation for the exam so your guinea pig is protected and comfortable.


    Hold the guinea pig gently but firmly. Guinea pigs are easily scared and will often struggle when frightened. Avoid freaking out your cavy by holding the cavy firmly but gently around the chest and shoulders. Place the guinea pig on the back or the rump, so the stomach and genital area are facing you and cradle the cavy’s back with one hand. This will make it easier for you to examine the cavy’s genitalia.[5]

    Cavies dislike being on their backs for a long period of time. Try to do the examination quickly and efficiently. You may want to ask someone to help you hold the cavy while you conduct the examination to speed up the process.

    Give your guinea pig a treat while doing this. It will make them easier to work with and less scared.

    Part 2 Part 2 of 2:

    Identifying the Guinea Pig’s Sex


    Check the distance between the guinea pig’s anus and genitals. Start by looking for the cavy’s anus, which is a vertical opening that is often gray or brown colored. The anus will be located underneath the cavy’s genitalia.[6]

    Once you have distinguished between the cavy’s anus and the cavy’s genitals, you can look at the distance between the cavy’s anus and the cavy’s genitals. Female guinea pigs have a shorter amount of space between their vulva and their anus. Often, the vulva sits right above the anus in female cavies. Male guinea pigs have a larger amount of space between their penis and their anus, about 2-3cm of space between the penis and the anus.


    Examine the shape of the cavy’s genital opening. Look closely at the cavy’s genital opening. Female guinea pigs usually have a smooth swelling over their genital area. Use your fingers to part the genital opening gently. If the genital area forms a "Y" shape, this means the cavy is female.[7]

    Male cavies have a genital opening that is shaped like a small circular dot with a penis raised above the level of the surrounding skin.

    Source : www.wikihow.com

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