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My 8-month-old guinea pig is 2.6 lbs. Could she be pregnant?

Updated On September 23rd, 2025

Pet's info: Small Animal | Guinea Pig | Female | 2.6 lbs

I wonder what the average weight for a eight month old guinea pig. I think she’s pregnant. She weights 2.6 pounds. She’s the one with multi colors

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1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on August 18th, 2019

Guinea pigs reach their adult weight around eight months of age, and it is for females, on average, 1.5 – 2.5lb. If Coco is 2.6lbs, she likely isn't pregnant. It is never recommend to breed a guinea pig past eight months of age due to the pelvic symphysis fusing. I would not keep her in cage with an intact male guinea pig.

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