Your guinea pig needs a variety of foods to stay healthy including a high-quality nutritionally complete pellet, lots of fresh greens, fruits and vegetables for snack and hay. Make sure your pig has access to hay at all times. Hay provides roughage and helps your guinea pig’s digestive system work well. It also helps keep your pig’s teeth trim since his teeth grows continually throughout his life. Alfalfa hay is okay for young guinea pigs but it provides too much protein for adult pigs so timothy hay is a better choice. Dried timothy hay from a pet store is okay but it is better if you can find a source of fresh timothy hay online or at a horse supply store. Keep the hay dry so it doesn’t mildew. Replace the hay in your pig’s cage since it can become soiled easily. Learn more from your Lawrenceville, GA veterinarian.