Rabbits and Guinea Pigs
Unlimited grass hay (like timothy hay) should make up roughly 80% of their diet — it’s essential for digestive health and keeps teeth naturally worn down. Pellets and fresh vegetables round out the rest. Guinea pigs specifically need a source of vitamin C, since unlike most mammals they can’t synthesize it themselves — fortified pellets or vitamin-C-rich vegetables like bell peppers help cover this.
Hamsters and Mice
A quality seed or pellet mix works as a base diet, supplemented occasionally with small amounts of fresh vegetables or fruit. Avoid sugary treats and be cautious with high-fat seed mixes, which hamsters will happily overeat.
Foods to Avoid
Iceberg lettuce (mostly water, little nutrition), chocolate and sugary human food, and — for rabbits and guinea pigs specifically — sudden diet changes, which can cause serious digestive upset.
Fresh Water
Always available, checked daily — water bottles can clog, so verify they’re actually dispensing, not just present.
