Yes, guinea pigs can eat lettuce in moderation. It is important to provide a variety of vegetables in their diet to ensure they are getting all the necessary nutrients. Iceberg lettuce should be avoided due to its low nutritional value and high water content. It is recommended to feed guinea pigs darker, leafy greens such as romaine lettuce, green leaf lettuce, or red leaf lettuce. Always introduce new foods gradually to prevent digestive issues.
