There are a few people who work sheep with dogs.  I have a friend who does search and rescue with her GSDs and trains others.

I'm not a good rider or dog trainer but Wynn Strickland tried to help me and my dog like most GSDs was devoted and tried to please me.  However she was a tough cookie,  not really a beginners dog.  She had a sweet and kind personality and her mannerisms were a lot like Uran's.  She could look mean as spit when a stranger approached our car or house but never bit, but she would hold them.  She protected my young son.  She protected our little Yorkie and cats were attracted to her like a magnet.   I never understood why strange cats would be attracted to her but she was kind to them and great with my horses and they liked her too.  She seemed to know friend from foe.  I think they can smell it.  When someone intends harm I bet they produce a different scent.  A member of the Washington Capitals hockey team came to watch our training and saw how fast my dog came to me on a recall and said he wanted a dog like her.  You couldn't ask for a more devoted dog who loved me and her family.   

http://www.minka.org/wynthea/books_frames.html

People still talk about Wynn and her kennel.   It's so sad to drive by and see how it's fallen into disrepair and part of the 25 acres have been sold.  Her friend and kennel manager is no longer in good health after a couple strokes.   The part of the property with the house and kennel are still for sale.  There's a good business opportunity yet.  It's in Landenberg, PA.  

There are but most people don’t own sheep anymore.   We have a few but they won’t use German Shepherds.

She sounds like the perfect dog.

It’s very difficult to make a living as a dog breeder today.

You would have to be so outstanding with additional work like authoring an authoritative book after you have been extremely successful in the show ring.  Otherwise breeding is a side job.  Few kennels can survive without name recognition.   

Breeding is a full time job for many working line dogs that will never see a show ring. They are bred for performance and people's lives can depend on them.  Stephanitz wanted his breed to be kept a working dog.

My late friend Wynn Strickland was friends with his daughter so she knew all about him.  She wrote the only authoritative book about the origins of the German Shepherd through facts not opinion and she showed her dogs and was an AKC judge for 18 years and earned over 200 AKC titles, a record still held posthumously.   There has never been a more knowledgeable person about the German Shepherd in America and she was well known for her work in obedience,  agility and breeding with an excellent eye for the breed.  We were good friends and we went to shows together and I would train with her and be her assistant.   It was a lot of fun.   Read her book The German Shepherd Today if you want to know the facts.  She never assumed what he thought, she got it from his daughter.

That was true 30 years ago, but we now have three lines that are so different they are almost different breeds.  Working line dogs should be able to work.  They are never found in a show ring unless it’s a working show.  Most show dogs today are American showlines, and a smaller number of West German Showlines.  The dog you had was a Showline.