Guinea Pig Nutrition: Complete Feeding Guide

Published: April 17, 2026

Comprehensive nutrition guide for guinea pigs including vitamin C requirements.

Guinea pigs have unique nutritional needs, most notably their requirement for dietary vitamin C. Like humans, guinea pigs cannot produce their own vitamin C and must obtain it from food. Unlimited grass hay should be available at all times for digestive and dental health. Offer 1 cup of fresh vegetables per guinea pig daily, focusing on vitamin C-rich options like bell peppers, kale, and parsley. High-quality guinea pig pellets fortified with vitamin C should be provided daily - about 1/8 cup per pig. Avoid rabbit pellets which lack necessary vitamin C. Fresh water must be available at all times. Limit fruits to occasional treats due to sugar. Never feed guinea pigs iceberg lettuce, potatoes, or onions. Introduce new foods gradually. Monitor weight and droppings regularly. Guinea pigs are social eaters and do best when housed with companions.

Frequently Asked Questions

What should I feed my guinea pig?

Unlimited hay, 1 cup fresh vegetables daily, guinea pig pellets, and fresh water.

Why do guinea pigs need vitamin C?

Guinea pigs cannot produce vitamin C and must get it from their diet to prevent scurvy.

What vegetables are high in vitamin C for guinea pigs?

Bell peppers, kale, parsley, broccoli, and tomatoes are excellent sources.

Can I feed rabbit pellets to guinea pigs?

No, rabbit pellets lack the vitamin C guinea pigs require.

How much should I feed my guinea pig?

1/8 cup pellets and 1 cup vegetables daily, plus unlimited hay.

Can guinea pigs eat fruit?

Yes, but only as occasional treats due to sugar content.

What foods are toxic to guinea pigs?

Iceberg lettuce, potatoes, onions, garlic, and chocolate are dangerous.

Do guinea pigs need vitamin C supplements?

If fed proper diet with vitamin C-rich vegetables, supplements usually aren't necessary.