I have to just laugh at how calm the shepherd compared with the CC.
You have to love the head swallow. Mine does the same. MY boy can hold the neck or paws of a pup and mouth so gentle you do not hear a squeak. He can be a body slammer though and is working line west german. So my breeder says when we do get a match for him to get a large size mellow female for him.I have a mini doxie (aprox 12 lbs.) and a 90 lb GSD. He is great with her. He does sometimes get a little rough, he is very physical with his front paws. She just lets him know she has had enough and he backs down.
One of the games they play is he puts her entire head into his mouth. She licks the back of his throat (eeckk) while he mouths her head. Drives me crazy.
My GSD has more than enough prey drive and will chase any small critter that runs. She'll just stare out her window and wait for a squirrel to enter her yard. Don't even mention the "S" word around her unless you want to see her get all worked up.Don't you guys think it all depends on the dog and it's pray drive? Also a big part of it is getting them socialized with small dogs really early in life.