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My guinea pig is losing hair. Is it serious and what should I do?

Updated On September 23rd, 2025

Pet's info: Other | Unknown - Other | Male | unneutered

Found this on my guinea pig I recently got he's 2 years old, is it serious

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Answered By Jessica Keay, DVM

Veterinarian

Published on June 18th, 2017

One cause of patches of alopecia (hair loss) in guinea pigs is ring worm. This is a fungus that is contagious so I would recommend a vet exam to have the area tested. In the meantime be sure to wash your hands well after handling your guinea pig.

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