open-the-cages:

A mother goose had lost her lifelong mate and was left alone to create and tend to her nest. She spent the day sheltering her eggs from the cold spring air inside an empty cemetery urn chosen as home. The loss of her male partner made her vulnerable to any would-be predators who choose to approach the nest. But, in an unlikely twist of fate, an adult deer had befriended the mother goose, taking over the role of protector. 
This animal friendship is highly unusual, since there’s no known way that a deer and goose can communicate. Yet somehow the deer has come to understand the need of the nesting mother. 
The deer then spent its days near the urn acting as guardian when needed. As passersby approach the area the deer stands and places itself between the person and the nesting goose. On one occasion the deer even took a protective stance taking on a barking dog near the area of the urn. ♥

http://www.youtube.com/watch?v=26SecMYvQaA