What is a guinea pigs favourite food?

Guinea pigs tend to like carrots and hay over any type of food. Piggies need a constant supply of timothy hay to maintain proper digestion. Be careful that you don't give alfalfa hay by mistake. Some commercial feeds still contain alfalfa even though it's been found to be unhealthy.

lettuce and other greens like green beans and carrot tops but NOT ICEBERG LETTUCE it is bad for them.