Mr. and Mrs. Bunny — Detectives Extraordinaire! by Polly Horvath
Madeline lives with her hippie parents on a remote Canadian island. When she arrives home one day, they are missing; the only clue to their disappearance is a threatening note signed by "The Enemy." Meanwhile, world-famous rabbit chef Franny Fox has died. Because her recipes are all written in secret code, the plans to make millions by mass-producing and selling them to the Fox Community are all but foiled. The only one capable of decoding them is Madeline's Uncle Runyon. And the only people who know his whereabouts are Madeline's parents. Enter a gang of Fox kidnappers.
Luckily, Madeline discovers that she can understand animal languages and she meets Mr. and Mrs. Bunny. The rabbits have recently decided to become detectives and they take the case. This cute satire will have you wishing that you could speak "rabbit," too!