What Can Guinea Pigs Eat? A Food Guide That Starts With Hay

If your guinea pig could write the grocery list, it might simply read: more vegetables, please. Our job is to make sure the menu does more than get a happy wheek. A healthy diet is built on high-fiber hay, not the treat bowl.

The everyday menu

• Unlimited grass hay. Fresh timothy or orchard grass hay should always be available to healthy adults. Replace wet, stale or contaminated hay. Young, pregnant or nursing guinea pigs may need different hay and pellets; ask a guinea-pig-experienced vet.
• Measured guinea-pig pellets. Choose plain, species-specific pellets with vitamin C, without seeds, colorful mixes or dried fruit. Follow your veterinarian and product guidance for amount; a commonly cited adult reference is about 2 tablespoons daily, but needs vary.
• Fresh vegetables. Offer a daily assortment with vitamin C-rich choices. Around 1/2 to 1 cup per adult guinea pig is a commonly published starting range, not a rigid prescription. Adjust for body condition and medical advice.
• Clean water. Provide it continuously; refresh and inspect the bottle nozzle or bowl each day.

Build the veggie bowl without guesswork

Start with bell pepper for vitamin C, then add washed romaine or other appropriate leaf lettuce, cucumber, and a little zucchini or cilantro. Rotate suitable produce instead of feeding one vegetable indefinitely. Celery may be offered carefully cut into short pieces to manage stringy fibers.

Keep carrots and fruit as small, infrequent extras. Broccoli and other brassicas may cause digestive discomfort in some guinea pigs; introduce slowly and watch for changes. Spinach, parsley and kale should not dominate a routine menu, particularly when a pig has urinary problems. A veterinarian can customize the mix for an individual animal.

What should stay off the menu?

Avoid onion and garlic, potato, avocado, tomato leaves or stems, chocolate, bread and other processed human snacks, dairy, nuts and seeds. Do not feed lawn clippings. Iceberg lettuce offers little nutrition and is best skipped. Never assume that a food safe for people, rabbits, or another pet is appropriate for guinea pigs.

Vitamin C is not optional

Guinea pigs cannot produce their own vitamin C. Freshly stored guinea-pig pellets and appropriate vegetables help supply it; vitamin C in pellets declines as food ages. Drops in drinking water are unreliable and may alter drinking behavior. If a supplement is needed, use a veterinarian-directed plan instead of guessing a dose.

A simple daily check

Notice what disappears from the hay pile, which vegetables are left, and whether droppings and activity remain typical. Introduce one new food gradually. If eating stops or droppings decrease, that is a reason to contact an exotic-animal veterinarian promptly - not an invitation to wait and see.

Always check with a guinea-pig-experienced veterinarian about diet questions, illness, urinary problems and young or pregnant animals.