Grapefruits are toxic to guinea pigs. They contain a compound called psoralen which can cause:
* Skin irritation and sensitivity to sunlight
* Gastrointestinal upset (diarrhea, vomiting)
* Liver damage
Even small amounts of grapefruit can be harmful to guinea pigs. It's best to avoid feeding them any citrus fruits, including grapefruits, oranges, lemons, and limes.
Safe fruits for guinea pigs include:
* Apples (in moderation)
* Bananas (in moderation)
* Berries (strawberries, raspberries, blueberries)
* Melon (watermelon, cantaloupe)
* Mangoes (in moderation)
* Pears
Always introduce new foods gradually and monitor your guinea pig for any adverse reactions.