Guinea pigs can eat cucumber flesh, seeds, and skin. Unfortunately, eating too much cucumber can cause soft poops, diarrhea, and other digestive issues. So, this vegetable should be fed in moderation.

Grass hay should be around 80% of your guinea pigs’ diets. Guinea pigs should regularly have fresh greens and a variety of vegetables. Cabbage, red and green leaf lettuce, kale, parsley, mustard ...