What are the common foodstuffs for guinea pigs?

Guinea pig pellets are available that contain all the nutrients needed. These pellets are hard and serve to wear
the teeth down.
Pellets that have high alfalfa content and dry alfalfa hay are suitable for young, growing guinea pigs and
pregnant females. Clover and grass hay pellets and dry clover and grass hays with low protein content are
more desirable for grown animals. It is important that hay not be moldy, musty, or dusty; moldy hay can be
fatal. The pellets and dry hay also help to wear the animal's teeth down.
Romaine lettuce, green leaf lettuce, carrots, apples, pears, turnips, beets, and cucumbers are also favorite
foods of guinea pigs. Iceberg lettuce should be avoided because it is less nutritious and may lead to diarrhea.
Wheat, corn, and oats are high-protein foods that can be added to the diet.