Companion Animals

Guinea Pig Diet and Metabolic Welfare

Guinea pigs have specific nutritional requirements including dietary vitamin C, high-fibre hay as the dietary foundation and appropriate calcium balance that are frequently misunderstood, causing preventable welfare problems.

Key Facts

Guinea pigs cannot synthesise vitamin C and require 10-30mg daily from fresh food sources
Dental disease from inadequate fibre intake is one of the leading welfare problems in pet guinea pigs
Commercial muesli mixes allow selective feeding that creates nutritional imbalances
Hay should constitute 80-90% of the diet to maintain dental wear and gut motility

Welfare Considerations

Guinea pig dietary welfare problems are almost entirely preventable with correct husbandry information. Dental malocclusion caused by inadequate fibre intake causes chronic pain and leads to anorexia and weight loss. Vitamin C deficiency causes scurvy causing pain and immune compromise. Both conditions are irreversible once established, making prevention essential.

What You Can Do

Provide unlimited fresh timothy or meadow hay as the primary diet component
Supplement with fresh green vegetables high in vitamin C including bell peppers and kale daily
Use nugget-style pellets rather than muesli mixes to prevent selective feeding
Schedule annual dental checks with a guinea-pig-experienced exotic vet from the first year of ownership