I agree. A reputable breeder who has spent a fortune on Hip scoring Haemophiliac testing their dogs, carefully researched and planned the mating to try to produce the most well adjusted and typical healthy Kennel Club registered pups possible will want to ensure that they will fit in smoothly into their new homes.

They will be willing and eager to answer any questions you have about training and socialisation.

GSD's of correct temperament live very easily with other dogs. I know many GSD's and a fair proportion of them live with small dogs where they are usually subservient to them. GSD's thrive on kind strong leadership. They need to have such a person and most often attach very much to their main Boss.

As long as you have avoided poor breeding (see here:Dog-Play: Use this guide to obtain a quality puppy from a responsible breeder) you should be able to rely on them.