If your pup barks and barks at whatever he can't see, give him a new point of view. The aptly-named PetPeek gives the dog his own window into life beyond the "bark-yard" with a durable, clear dome for him to check out. If you own a saw and drill, it comes ready for installation in a wooden fence at your pup's eye level.
There is, however, no guarantee that he won't now bark at what he can see! Will your doggie expect to see his very own PetPeek (for $29.98) in your patio anytime soon?