Book Review- Duck! Rabbit!

This is a hilarious book that my daughter finds quite enjoyable and one which I laughed out loud at the first time I read to her.  This book was a Christmas gift from friends and Bean has been enjoying it ever since.  It has an illustration of an animal that could be a duck or a rabbit and the book is about the ongoing discussion about which one it truly is.  It is really cute and in case you're wondering, my daughter definitely thinks it's a rabbit.  Have any of you read it?  What do you think it is, a rabbit or a duck? ;)