Wheekerpedia: J
J is for:
Jump: A guinea pig jump is known as a popcorn. This happens when thay are happy and they often reach great heights with some of them even twisting in the air.
Just Grass: A short chopped, quick dried grass that is higher in feed value than hay. Higher in Timothy Grass content than other dried grasses.
Juvenille: Guinea pigs grow at different rates but generally speaking they are fully grown by a year old.