I really like this, but it sounds like it needs resolution of some type. The last verse goes straying from the animalian concepts in the first two. I might write one more verse and tie it back in somehow -- I know you're going for sound and not meaning, but meaning should play some part too, if it's going to feel right... a la Dr. Seuss' more wacky sound-play stuff. (Red Fish, Blue Fish, or There's a Wocket In My Pocket).