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Can Guinea Pigs Eat Fennel?

Yes, guinea pigs can eat fennel bulbs safely as part of their daily vegetable portion. Fennel has a crunchy texture similar to celery and a mild aniseed flavour that some guinea pigs enjoy. Feed in moderation alongside other fresh vegetables.



Benefits of Fennel for Guinea Pigs

  • Crunchy and enjoyable — Many guinea pigs like the texture, and it provides variety in their diet.
  • Moderate vitamin C — Contains 9mg per 100g, supporting guinea pigs’ vitamin C needs as they cannot produce this vitamin themselves.
  • Good source of fibre — Supports healthy digestion and gut function.
  • Distinctive flavour — The mild aniseed taste adds variety to your guinea pig’s daily vegetable portion.

How to Safely Feed Fennel to Guinea Pigs

  • Frequency: Occasionally or in small quantities
  • Quantity: A small slice per piggy per serving
  • Edible Parts: Bulb and leaves (fronds)
  • Preparation: Wash thoroughly before feeding

💡 Tip: Mix fennel with other greens and vegetables that are high in vitamin C and fibre to create a balanced daily portion for your guinea pigs.


Guinea Pig Food Charts in Full Colour showing what vegetables, fruit and herbs guinea pigs can safely eat and how often, plus meal planner. Available to purchase.

Nutrition Information

Nutrition🍃mg per 100g
Vitamin C9
Calcium20
Sugar3.3
Water92.9
Fibre1.8
Phosphorous50

Safe Vegetables

Full information on safe vegetables for guinea pigs including feeding guide ›

🫑 Bell Peppers → Read the Bell Pepper guide ›
🥬 Bok Choy → Read the Bok Choy (Pak Choi / Chinese Leaf) guide ›
🥦 Broccoli → Read the Broccoli guide ›
🥕 Carrots → Read the Carrot guide ›
🌱 Celeriac→ Read the Celeriac guide ›
🌱 Celery → Read the Celery guide ›
🥬 Collard Greens → Read the Collard Greens guide ›
🌾 Corn on the Cob → Read the Corn guide ›
🥒 Cucumber → Read the Cucumber guide ›
🌼 Dandelion → Read the Dandelion guide ›
🌿 Fennel → Read the Fennel guide ›
🌿 French Beans (Fine Green Beans) → Read the French Beans guide ›
🥬 Kale → Read the Kale guide ›
🥬 Lettuce → Read the Lettuce guide ›
🌿 Spinach → Read the Spinach guide ›
🍅 Tomato→ Read the Tomato guide ›
🍃 Watercress→ Read the Watercress guide ›

Safe Fruits

Full information on safe fruit for guinea pigs and feeding guide ›

🍎 Apple →Read the Apple guide ›
🍌 Banana →Read the Banana guide ›
🫐 Blueberries →Read the Blueberries guide ›
🍇 Grapes →Read the Grape guide ›
🍈 Melon →Read the Melon guide ›
🍓 Strawberries →Read the Strawberry guide ›
🍉 Watermelon →Read the Watermelon guide ›

Safe Herbs

Full information on safe herbs for guinea pigs and feeding guide ›

🌿 Basil → Read the Basil guide ›
🌱 Coriander (Cilantro) → Read the Coriander guide ›
🌿 Dill → Read the Dill guide ›
🌱 Mint → Read the Mint guide ›
🌿 Parsley → Read the Parsley guide ›

Monique Hanford

Monique Hanford

Monique Hanford is a trusted guinea pig expert and founder of Guinea Piggles, one of the UK’s leading resources on guinea pig welfare. With nearly a decade of hands-on experience and research into guinea pig care, she provides practical, evidence-based guidance to help owners give their pets the best possible lives. Find out more...View Author posts