Rodents, yep...talkin' about rats and 4600 other species...40% of mammals. People eat them, exterminate them, feed them to other mammals, turn them into coats, use them for laboratory testing, and even keep them as pets. Rats, Mice, Guinea pigs, Squirrels, Prairie Dogs, Beavers, Porcupines, Hamsters, Rabbits, Hares, Pika, Capybara, Gophers, Marmots, Gerbils, Jerboa, Lemmings, Chinchillas, and on and on and on.