I guess somebody got really sick of having their dog dig beneath the fence to see what lay on the other side and thought it might be better to have a pet window installed. Instead of simply having a hole cut into the wall/wood, the genius went the whole nine yards and had the Pet Peek covered with an acrylic plastic bubble to let the dog stick his snoot in. The added bonus is that for just $30 it also helps your pet to acclimatize your pooch to space helmets for when you go and live in a galaxy far, far away!
Source: Geekologie