Baby guinea pigs, called pups, can eat solid food within a few days of being born. They drink their mother’s milk at first, but they also nibble hay, pellets, and vegetables almost right away, so the right food needs to be in the cage from day one. Human baby food, jarred purees, and cow’s milk are not appropriate.
What Pups Should Eat
- Unlimited grass hay. Timothy or orchard hay supports healthy digestion and tooth wear. Alfalfa hay is also commonly offered to growing pups for extra protein and calcium. See Can Guinea Pigs Eat Alfalfa?
- Guinea pig pellets. Plain pellets made for guinea pigs with added vitamin C. Pellets for young or growing guinea pigs are often alfalfa-based.
- Fresh vegetables. Small amounts of leafy greens and bell pepper, introduced slowly.
- Fresh water. Use a bottle with a low spout the pups can reach.
- Mom’s milk. Pups usually nurse for roughly the first few weeks.
Why Vitamin C Matters
Guinea pigs of every age cannot make their own vitamin C. A shortage can cause scurvy, with symptoms such as sore joints, rough coat, poor appetite, and reluctance to move. Good daily sources include bell pepper and fortified pellets. Ask your vet whether your pups need a supplement.
What About Human Baby Food?
It is best to avoid human baby food. Many jars contain sugar, starch, onion or garlic powder, dairy, or fruit blends that can upset a guinea pig’s digestive system. Pups do better on their normal solid foods than on purees.
If a Pup Is Not Eating or Is Orphaned
A pup that stops eating, loses weight, or has been separated from its mother needs a veterinarian right away. Guinea pig pups are fragile, and a vet who treats exotic pets can tell you whether supplemental feeding is needed and how to do it safely. Please do not try home-made milk formulas.
Foods to Avoid for Pups
- Cow’s milk, yogurt, and cheese
- Seeds, nuts, and dried fruit
- Onion, garlic, chives, and avocado
- Chocolate, bread, and sugary snacks
- Rabbit pellets without vitamin C
See our guide to foods that are toxic to guinea pigs for a longer list.
When to Switch to Adult Food
Many guinea pigs stay on growth-style food until around six months of age. After that, most do better on grass hay and plain adult pellets. Ask your vet when to make the change, especially for pregnant or nursing mothers. For the full adult menu, read what guinea pigs eat.
Bottom Line
Feed baby guinea pigs the same kinds of foods adults eat: hay, plain pellets, a little fresh produce, daily vitamin C, and water. Skip human baby food, and call a vet immediately if a pup stops eating or is without its mother.
This article is general information, not veterinary advice.
