Shepherds have used dogs to protect livestock for thousands of years. But burros also have a natural instinct to protect, which makes them a perfect guardian animals as well. Meet Rena and Roo, a super dog-and-burro guardian team at work on a sheep ranch in Wyoming. The animals have a close connection with the sheep they protect, but it takes time and effort for Rena and Roo to grow to trust one another. In this companion book to her award-winning Brave Dogs, Gentle Dogs, Cat Urbigkit uses simple, informative text and eye-catching photographs to show how Rena and Roo develop into guardian animals.