Pet Peeks are torture devices for dogs that make them look like space cadets. They consist of an acrylic plastic bubble you install in the fence so your pet can see out. They cost $30 apiece and make me sad. I'm not really convinced that a Pet Peek is better than your dog just not knowing what's happening on the other side. I mean, why not just a hole? Ah yes, dogs can't wipe their snot on a hole. Nor can you sell them (except in donut form).
Pet Peek [zuzafun]
Thanks to Sophia, who is awesome as all hell, for the tip