What will happen if you do not trim overgrown guinea pig teeth?

Your not supposed to trim their teeth! All guinea pigs and other rodents, should be provided with somthing to chew on. In the wild, they gnaw on wood, and eat hard foods to wear their teeth down naturally. In captivity, people forget that these animals still need to do what they do naturally. Buy a chew log from your local pet store. DO NOT ATTEMPT to file your own guinea pigs teeth. If you are THAT concerned, schedule an appointment with a local vet that specializes in exotic pets. Guinea pigs are considered to be exotic.