Bunnies in the Bathroom

 is the eleventh book in the Animal Ark book series, written by Lucy Daniels, which was first released in 1995.

Summary
Mandy's new friend John is crazy about rabbits! He's got his heart set on Button and Barney, two baby rabbits in the local pet shop. But when he goes to buy them, they've already been sold! Mandy and James decide to track down the new owner and try to get the bunnies back...