Is this a purebred German Shepherd?

  
Blondi

32304
 
 
Barked: Thu Sep 29, '11 6:03pm PST 
Do you think this is a purebred GSD in this video?

http://www.youtube.com/watch?v=ovaUBQcDma8
Howard

Tail Waggin'- Mutt
 
 
Barked: Wed Oct 10, '12 5:07pm PST 
It could be, but it doesn't look like it. The dog is either badly bred or is a mixed breed.
Destiny

And I'm On My- Way!
 
 
Barked: Thu Jul 11, '13 10:01pm PST 
The dog is purebred and looks to be out of German Show lines. His structure is quite typical of German show line dogs. The GSD looks like an older dog. He clearly is arthritic and weak in the rear. He acts like he is in pain and doesn't want bounced on by a puppy.