Most pet owners think that wildlife will stay away from yards because their pets will stand their ground. But, that is not always the case. See what happens when a small dog continuously barks at a deer on the other side of a fence. 

A few notes:

1. His bark is not so intimidating after all.

2. Deer, and other wildlife, won't always back up.

3. The height of a pet fence matters for keeping away wildlife (7.5 to 8' feet high deer fence is best).