one of my mice has swollen balls. he seems very lively and well. They come up and then they go down. Is he just sexually active?
It sounds to me like he might have a tumor! I would take him to the vet just to be sure he is okay, even if he seems all happy and running around.
I don't think it's normal and he needs to see a vet. Balls don't get swollen due to sexual activity. I think there is something going on. Good luck to your little mousie.
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I hope you arent kidding . If you are seroius . The male mouse you are talking about is indeed mature. chances are you have a female near by that is in heat.
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I'm not familiar with mouse anatomy nor would I know when a mouse is sexually active so I'd suggest taking the mouse to the vet to find out if there is something you need to be concerned about.
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