
Guest a long haired GSD is non standard and should not really be bred from. Non standard coats do appear in litters but should not deliberately be bred from if you are using the breed standard as your aim in breeding better puppies than the parents which should be your aim.
I am assuming that you ahve had your bitch hips x-rayed and the plates submitted to the BVA for scroing? Yous hould also be aware that any stud shoudl also be Hip scored with a low score and be tested for Hamophilia.
Please read the first post on the breeding forum, which relates to stud dogs. Also have a look at this link
http://st15.startlogic.com/~justonel/breeder.html