Pet Heaven is like People Heaven, except for pets. It is separate from People Heaven, thus giving it its name. Only good animals go here; the rest go to Hell. Pet Heaven (which henceforth will be called P-Heaven, because that sounds more awesome) was constructed in 6,000 BNR when regular Heaven, which housed both people and animals alike, ran out of room. At first, this problem was solved by throwing excess cats back down to Earth. Thus, the popular expressions, "It's raining cats and dogs.", "Cats always land on their feet." and "Holy fuck I just got hit by a cat, that really hurts, please get off."