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Old 07-11-2019, 03:44 PM  
souffle
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Join Date: Nov 2005
Location: Yorkshire, UK but my heart lies in Scotland!
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Default Re: Hamster Swollen Area

These look like bite marks and they are very likely fighting. They are quite nasty and the typical place for the bite is in the genital areas. Sadly the cage is also too small for one hamster never mind two I'm afraid. You probably don't see them fight as they are likely to do it during the night. It's not a natural situation for two mature males to live together and they often fight
I'd separate them and watch the bites carefully for signs of infection. If you feel at all worried see the vets. A large storage bin each kitted out would make a lovely home for each one at little cost. Don't clean them out so much as it makes them lose their scent and they don't like that.
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