I think these dogs look like Shaggy, but they're different mixes!

http://www.dogster.com/pet_page.php?i=74272&j=t&t=t

http://www.dogster.com/pet_page.php?i=164468&j=t&t=t

http://www.dogster.com/pet_page.php?i=41057&j=t&t=t

http://www.dogster.com/pet_page.php?i=30620&j=t&t=t

Heres a shepherd/golden named Shaggy!
http://www.dogster.com/pet_page.php?i=169794&j=t&t=t

He could have the build of a Shepherd but characteristics of a rott.