Two chipmunks frolic around an enclosure more usually used as an aviary.A large Vietnamese pig, a misguided 21st birthday present, snuffles around his pen and a roomful of soon-to-be adopted cats listen to Rhythm is a Dancer on the radio. ???Cats love music,??? says Gillen. (He doesn???t explain why these cats have such terrible taste.)It is hard to believe that all of these animals have experienc