That's awesome! Does it block your rear view much?
No, it really doesn’t block the rear view at all. No more than having a passenger sitting directly behind you in the backseat of a car.
I put these views together: You don’t see much of the dog from directly ahead of the truck… So not much is sticking out into the slipstream at highway speeds. Then from the inside, you can see how much of the dog you see in the rearview mirrors. My knuckles are blocking most of what you see in the interior mirror. You can see the most by looking in the wide-angle part of the outside mirror.

Thanks for the compliments, they made my daughters day.
And during the first trip on the highway today, I got a lot of smiles, and noticed a cell phone picture being taken as a car went buy.