Guinea pigs are strict herbivores with a digestive system built for one thing: a constant, slow flow of high-fiber forage. Everything you put in the bowl either supports that or works against it. The list below covers 85 foods, from the ones that can go in every day to the handful that are genuinely dangerous.
Search for a specific food, or filter by how often it can be fed.
Check how often a food can be fed, and which ones are known to cause gas.
Add a single new food, then wait 24 hours before adding another. Sudden diet changes are a leading cause of bloat, and doing it one at a time is the only way to know which food caused a reaction.
Guidance is general and sources vary — many foods are fine in small amounts but risky as a staple. Fresh food is a supplement, not the diet: it should always sit alongside unlimited hay, which does most of the work in keeping the gut moving. Ask an exotics vet about any pig with a history of bloat, stones or a sensitive gut.