Donkey on the Doorstep

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

Summary
Dorian the donkey is about to be homeless. Andi, his owner, doesn't want to give him up. But her family is moving into a smaller house - and there's no room for a donkey there. But the clever donkey has other ideas. Can Mandy help her stubborn friend?