A recent dachshund race in San Diego illustrates why dogs should not have windows.
As the red arrow points out, the race has started but one dog is busy looking out its back window. http://www.theglobeandmail.com/life/life-video/video-dachshunds-race-for-top-dog-title/article13597261/
Here is another example.
Yep those are dogs slobbering out an RV window.
In conclusion, these photos illustrate why dogs should NOT have windows.
Regarding which wiener is the winner, it unfortunately is not the dog above the red arrow.