Owl in the Office

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

Summary
Animals always come first for Mandy, and at Animal Ark - her parent's busy veterinary surgery - she is always making new friends.

When Mandy discovers an abandoned baby Owl, she takes it along to Welford Animal Sanctuary. But the rent has been raised and it's a race againts time to save the sanctuary!