German Shepherds nails tend to grow pretty fast and should be clipped on a regular basis. Exercise is extremely important for this breed. They need to be exercised daily. At least long walks on the leash, running free in open fields is even better. Because of their enegry level and keen mind they can become troublesome if inactive.
Idle dogs can become timid, nervous, or even dangerous.
Continual contact with people from the time the dog is a puppy will end up making this breed a wonderful pet. It is essential to start obedience training while they are still a puppy. It is also not a good idea to leave them alone for long hours with nothing to do, or keep them restricted or tied up. This is a very common occurrence in Shepherds. Although in all other areas they make just as good pets, they can be however frustrating and difficult to handle and live with.