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Is my guinea pig overweight at 3 lbs? How can I help him lose weight?

Updated On September 23rd, 2025

Pet's info: Small Animal | Guinea Pig | Male | 3.1 lbs

Is my guinea pig overweight? If so, what should I do to help him get to a healthy weight? I just weighed him and he weighed in at 3 lbs 1.7 oz.

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3 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on July 4th, 2020

Thank you for contacting Petco Pet Education Center with your question about Snowball and for providing pictures, they are very helpful. Yes he is a bit overweight. He should be weighing around 2.5lbs and he does look overweight in the pictures. You need to adjust his diet. Around 80% of his diet should be high quality grass hay. He also needs vitamin c. In order to get a variety of nutrients and vitamin C, give your guinea pig up to 1 cup (128 g) of fresh vegetables and about 1/4 cup (30 g) of fresh fruit a day. Stick to this diet, nothing extra, and that should help him lose weight. Limit the amount of pellets he gets, as that can be a cause of weight gain. The Humane Society recommends that guinea pigs eat about 1/8 cup (30 g) of pellets a day. Also avoid high starch foods and commercial treats. Finally, get him to exercise. Let him run around the house supervised, and set up obstacles and toys in his cage to get him moving. I hope this helps!

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7Pet Parents found this answer helpful

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    Answered By Todd Cecil

    Veterinarian

    Published on December 29th, 2018

    Thanks for reaching out about your guinea pigs. Typically a normal diet of hay, pellets and some vegetables will keep guinea pigs at their proper weight. concerns would be why are your pets thin? Dental disease, intestinal infections/parasites or metabolic concerns would be possibilities. Try to have a look at the incisors for any abnormal wear. If your guinea pigs appears sick, a veterinary visit is recommended. Good luck.

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    1Pet Parents found this answer helpful

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    Answered By Todd Cecil

    Veterinarian

    Published on June 13th, 2019

    Thanks for reaching out. The key is to decrease caloric intake. Pellets and vegetables are usually the culprits. A good quality hay, free choice, is difficult to gain weight with. Cut pellets and treats in half. Increase allowed exercise by allowing to roam (supervised) in a play area. Good luck.

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    1Pet Parents found this answer helpful

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