Quick answer
The best guinea pig pellets are plain, uniform, timothy based pellets fortified with stable vitamin C. Our top pick is Oxbow Essentials Adult Guinea Pig Food. Small Pet Select is a strong upgrade, Kaytee Forti-Diet is the best value, and Sherwood suits beginners. Feed pellets as a measured supplement, about 1/8 cup per pig each day, on top of unlimited grass hay and a daily serving of fresh vitamin C vegetables.
Why fortified timothy pellets matter
Guinea pigs cannot make their own vitamin C, so a steady dietary source is essential to help prevent scurvy. Quality pellets add stabilized vitamin C, such as calcium ascorbate, to help cover daily needs. That vitamin C still degrades within about 90 days of milling, so buy small, dated bags and use them while fresh rather than stockpiling a large sack. Timothy is the right base for adult pigs because it keeps calcium and protein low, which supports urinary and digestive health and lowers the long term risk of bladder stones seen with richer diets.
What to look for
Choose a single uniform pellet with timothy hay listed first, guaranteed stabilized vitamin C, and crude fiber near 16 percent or higher. A short ingredient list without seeds, corn, or dried fruit keeps feeding balanced. Alfalfa based pellets are appropriate only for young pups under six months and for pregnant or nursing sows, since they carry more calcium and protein for growth. For most adult pigs, plain timothy is the safer everyday choice. Check the guaranteed analysis on the bag and pick a formula that names timothy hay first rather than grain byproducts or soy hulls.
How we chose
We prioritized plain timothy formulas with clearly stated stabilized vitamin C, high fiber, and simple ingredients from established small animal brands. We favored uniform pellets over colorful mixes, checked for sensible bag sizes that stay fresh, and weighed value for daily feeding. Our picks span an adult top choice, an everyday value option, a premium upgrade, and a gentle beginner formula, so most households can find a good match. We also leaned toward brands that publish clear nutrition panels and dating on the bag, so you can confirm freshness before you buy.
What to avoid
Skip colorful muesli or seed and piece mixes. Guinea pigs pick out the sweet bits and leave the fiber, which drives dental disease and gut trouble. Never substitute rabbit or generic rodent pellets, because they lack the vitamin C guinea pigs depend on. Pellets are a supplement, not the main meal, so keep the portion measured and let unlimited hay and fresh veg do the heavy lifting. Also skip flavored or yogurt coated treats sold near the pellets, since the added sugar can upset a guinea pig’s delicate gut. If you notice a rough coat, poor appetite, or swollen joints, ask your veterinarian about vitamin C, since these can be early signs of deficiency that need prompt care.
