Guinea Pig Diet and Nutrition

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Proper nutrition is the most important part of guinea pig care, and it plays a crucial role in guinea pig nutrition. A balanced diet supports digestion, prevents dental issues, and keeps your guinea pig healthy long-term.

Hay (Primary Diet – 80%+)

Guinea pigs must have unlimited access to hay for guinea pigs at all times.

Types: Timothy, orchard grass, meadow hay Hay supports digestion and wears down constantly growing teeth. Hay should be:

Fresh and dry

Green (not yellow or dusty)

Available 24/7

⚠️ Lack of hay can quickly lead to serious health problems.

Pellets (Supplement – Limited Amount)

Pellets should support—not replace—hay. Feed about 1/8 cup per guinea pig per day. Choose:

Plain, timothy-based pellets

No seeds, nuts, or colored pieces

🚫 Avoid mixes marketed as “treat blends”

Fresh Vegetables (Daily Variety)

Guinea pigs need 1 cup of fresh vegetables for guinea pigs per pig per day.

Daily staples:

Romaine lettuce

Green leaf or red leaf lettuce

Bell peppers (excellent Vitamin C source)

Cilantro

Rotate regularly:

Cucumber

Zucchini

Parsley (in moderation)

Carrot (small amounts only)

Vitamin C (Essential)

Guinea pigs cannot produce their own Vitamin C and must be provided daily through food. The best sources include:

Bell peppers (top choice)

Fresh greens

⚠️ Do NOT rely on:

Vitamin drops in water (ineffective and unstable)

Water

Provide fresh, clean water at all times. Use a water bottle or heavy bowl and change it daily.

Foods to Avoid

Some foods are unsafe or harmful:

🚫 Iceberg lettuce

🚫 Potatoes

🚫 Onions & garlic

🚫 Avocado

🚫 Dairy products

🚫 Meat or processed foods

🚫 Sugary treats

Treats (Occasional Only)

Treats should be limited to small fruit pieces (1–2 times per week max). Ensure to use guinea pig-safe treats only. Too many treats can cause digestive issues and obesity.

Important Feeding Tips

Introduce new foods slowly, wash all vegetables thoroughly, and remove uneaten fresh food within 24 hours. Monitor appetite daily.

⚠️ A guinea pig not eating is a medical emergency.

Our Standard

At North Idaho Guinea Pig Rescue, we prioritize a hay-based diet with proper supplementation to ensure long-term health, prevent illness, and support overall well-being.