Dog at the Door

 is a book in the Animal Ark book series, written by Lucy Daniels, which was first released in an unknown date.

Summary
At Animal Ark, Mandy Hope helps her parents treat animals of all shapes and sizes. Even outside the clinic, Mandy can't resist helping any animal in need.

One night, Mandy finds a distressed golden retriever tied up outside Animal Ark--with no sign of her owner. The dog is expecting puppies, and it doesn't look like there's long to wait! Who would leave a pregnant dog on a stranger's doorstep? Mandy can't believe anyone could be so cruel!

Can she find the dog's owner before the puppies arrive?