Whether you are very cultured, like Cat, or a little more spontaneous, like Dog, everyone will find something to love about the Nickelodeon CatDog Love the Earth Men's Graphic T-Shirt that features Cat and Dog with the phrase: "Love the earth love each other" along with the planet earth in the background! Earth Day is the perfect day to show off your appreciation for the environment and your favorite animated series about the odd brother duo, CatDog.