How to differentiate a male guinea pig from a female? Physical characteristics explained

Size and weight

One of the first physical characteristics that can help you differentiate between a male and female guinea pig is their size and weight. Generally, male guinea pigs tend to be larger and heavier than females. Adult male guinea pigs can weigh between 2 to 3 pounds (900 to 1350 grams), while females usually weigh between 1.5 to 2 pounds (680 to 900 grams). However, it's important to note that individual variations can occur, so size and weight alone may not be a definitive indicator of the sex of a guinea pig.

Genitalia

The most obvious physical characteristic that distinguishes a male guinea pig from a female is their genitalia. Male guinea pigs have a visible penis, which is located just below the anus. It is usually covered by a small flap of skin called the prepuce. On the other hand, female guinea pigs have a genital opening, which is located just below the anus as well. The genital opening in females is a small slit, and there is no visible protrusion like in males.

Anal region

Examining the anal region can also provide clues about the sex of a guinea pig. In males, the distance between the anus and the genital opening is larger compared to females. This is because the penis is located further away from the anus. In females, the distance between the anus and the genital opening is much shorter.

Body shape

Another physical characteristic that can help differentiate between male and female guinea pigs is their body shape. Male guinea pigs tend to have a more elongated and muscular body shape compared to females. Their bodies are generally longer and broader. On the other hand, female guinea pigs have a more rounded and compact body shape. Their bodies are usually shorter and narrower.

Behavioral differences

While not a physical characteristic, observing the behavior of guinea pigs can also provide clues about their sex. Male guinea pigs are often more territorial and aggressive compared to females. They may display dominance behaviors such as mounting or chasing other guinea pigs. Female guinea pigs, on the other hand, are generally more social and less aggressive.

Other physical characteristics

There are a few other physical characteristics that can help differentiate between male and female guinea pigs, although they may not be as reliable as the previously mentioned ones. Male guinea pigs may have a slightly broader head and a more prominent jawline compared to females. Additionally, some male guinea pigs may develop scent glands on their cheeks, which can appear as small raised bumps.

It's important to note that determining the sex of a guinea pig can sometimes be challenging, especially in young or inexperienced guinea pigs. In such cases, it is recommended to seek the assistance of a veterinarian or an experienced guinea pig breeder who can accurately determine the sex of the guinea pig.

In conclusion, there are several physical characteristics that can help differentiate a male guinea pig from a female. These include size and weight, genitalia, anal region, body shape, and behavioral differences. Observing these characteristics can provide a good indication of the sex of a guinea pig, but it's always best to consult with a professional if you are unsure.