Guinea Pig Nutrition and Welfare

Guinea pigs have specific nutritional requirements including vitamin C that they cannot synthesise; nutritional deficiencies cause preventable welfare problems in many pet guinea pigs.

Key Facts

Guinea pigs cannot synthesise vitamin C and require 10-30mg daily from dietary sources
Scurvy from vitamin C deficiency causes joint pain, haemorrhage, and death if untreated
Fresh hay should form 80% of the diet providing fibre essential for dental and gut health
Pellets provide concentrated nutrition but should not replace hay as the primary feed
Vitamin C-rich vegetables including red pepper, parsley, and kale are suitable daily supplements

Welfare Considerations

Guinea pig nutrition welfare failures are common because the importance of vitamin C is often underestimated or forgotten. A guinea pig developing scurvy experiences progressive joint pain and swelling, haemorrhage into tissues, and deteriorating general condition over weeks or months. The condition is entirely preventable through adequate fresh vegetation or supplementation. The emphasis on dry pellets as a convenient complete diet can mask nutritional inadequacy; pellets do not maintain vitamin C content adequately after opening. Fresh daily provision of vitamin C-rich vegetables alongside unlimited hay provides both the nutrients and the fibre-based dental wear that guinea pig health requires.

What You Can Do

Provide fresh vitamin C-rich vegetables daily as a dietary supplement for guinea pigs
Never rely on vitamin C tablets dissolved in water which degrade rapidly
Ensure unlimited access to fresh hay as the primary component of the diet
Store pellets in sealed containers and replace regularly to maintain nutritional value
Research guinea pig nutritional requirements fully before acquiring these animals