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I Thought My Guinea Pig Was A Boy, But I Can't Tell If It's His Genitals Swelled Up?

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Amber Adams

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I got this guinea pig from a local pet store, they said that he was a male. I was a little worried because I already had a male guinea pig that was a new baby. They have been getting along perfectly. I've noticed that the one I got from the pet store (the older one) has been drinking and eating A LOT. The baby is not so much a baby anymore, but is still tinier, and he keeps humping the crap out of him. I checked his private areas to see if I could make out if he was actually a boy. It doesn't look like any of the pictures I've seen of male or female, but is something wrong with this ? I'm just so confused. P.s I have no idea how to post a picture up yet (new to this forum)
 
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Guinea-pigGaga

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Welcome to the forum!

Boars will mount one another - As will sows - occasionally! However, this behaviour often relates to dominance, and/or hormones - It is quite normal!

Without pictures, it is impossible to confirm the genders of your guinea pigs!

Perhaps, this link would be of use - Scroll down to the tutorial video titled, 'Adding images':

https://www.theguineapigforum.co.uk/threads/tutorial-videos.109353/

As 'The Guinea Pig Forum' welcomes members from all over the world, it would be very helpful if you were to update your location, so that any advice , and/or recommendations can be tailored to accommodate your requirements, and circumstances - Please update your profile to include your country, and/or city, county, or state. Please click on your username on the top bar, scroll down your 'Personal Details', and add your location. Thank you.
 

Wiebke

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I got this guinea pig from a local pet store, they said that he was a male. I was a little worried because I already had a male guinea pig that was a new baby. They have been getting along perfectly. I've noticed that the one I got from the pet store (the older one) has been drinking and eating A LOT. The baby is not so much a baby anymore, but is still tinier, and he keeps humping the crap out of him. I checked his private areas to see if I could make out if he was actually a boy. It doesn't look like any of the pictures I've seen of male or female, but is something wrong with this ? I'm just so confused. P.s I have no idea how to post a picture up yet (new to this forum)
Hi and welcome!

I am very sorry for your worries. Young boys look a lot more similar to girls before their testicles descend. You may find his link here helpful as it contains pictures of guinea pigs of various ages: http://www.cavyspirit.com/sexing.htm

Here is our step-by-guide on how to post pictures. Our video section is not yet working again after we had to switch providers. Alternaitvely, you can also copy/paste a picture that has already been been uploaded to the internet straight into your post. The clearer the picture the better; ideally you angle the genitalia towards a source of light. It is admittedly much easier if you have got somebody to help you!
https://www.theguineapigforum.co.uk/threads/how-to-post-photos.112751/

Mounting is a very normal mild dominance behaviour, it is especially strong when boars meet and establish their hierarchy and while they go through the hormonal teenage months between 4-14 months old. This generally starts around the time the testicles descend.
You may find these threads here helpful:
https://www.theguineapigforum.co.uk/threads/boars-a-guide-to-successful-companionship.76162/
https://www.theguineapigforum.co.uk/threads/dominance-behaviours-in-guinea-pigs.28949/

You can find more information at the top of our various Care sections, but you are welcome to ask any questions you may have at any point. I have moved your thread to the behaviour section.

With members from all over the world, we find it very helpful if you please added your country, state or (for the UK) your county or city, so we can always adapt any advice or recommendations straight away to what is available or possible for you. click on your username on the top bar, then go personal details and scroll down to location.
 

Amber Adams

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Welcome to the forum!

Boars will mount one another - As will sows - occasionally! However, this behaviour often relates to dominance, and/or hormones - It is quite normal!

Without pictures, it is impossible to confirm the genders of your guinea pigs!

Perhaps, this link would be of use - Scroll down to the tutorial video titled, 'Adding images':

https://www.theguineapigforum.co.uk/threads/tutorial-videos.109353/

As 'The Guinea Pig Forum' welcomes members from all over the world, it would be very helpful if you were to update your location, so that any advice , and/or recommendations can be tailored to accommodate your requirements, and circumstances - Please update your profile to include your country, and/or city, county, or state. Please click on your username on the top bar, scroll down your 'Personal Details', and add your location. Thank you.
image.jpg
 
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Amber Adams

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Welcome to the forum!

Boars will mount one another - As will sows - occasionally! However, this behaviour often relates to dominance, and/or hormones - It is quite normal!

Without pictures, it is impossible to confirm the genders of your guinea pigs!

Perhaps, this link would be of use - Scroll down to the tutorial video titled, 'Adding images':

https://www.theguineapigforum.co.uk/threads/tutorial-videos.109353/

As 'The Guinea Pig Forum' welcomes members from all over the world, it would be very helpful if you were to update your location, so that any advice , and/or recommendations can be tailored to accommodate your requirements, and circumstances - Please update your profile to include your country, and/or city, county, or state. Please click on your username on the top bar, scroll down your 'Personal Details', and add your location. Thank you.
 

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Wiebke

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That looks a like a boy with undescended testicles to me! You can always check whether the penis will come out yourself with a bit gentle pressure just above the penis. The slit should start below the penis and be straight. In a girl, the slit will start around the knob and and when it opens, it has got flaps on sides so the inside opening is rather x-shaped and not straight.

Some boys have what we call a "cauliflower willy" where the tip of the penis is spread out a bit like a caulifower. Here is a little video about an adult boar.
https://www.theguineapigforum.co.uk/threads/probably-a-weird-question-but-i-cant-find-anything-on-it.119455/#post-1619345
 
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