German Shepherd puppies:

1. Size: German Shepherd puppies typically weigh between 10-15 pounds at 8 weeks old.

2. Appearance: They have a thick, soft coat of fur that comes in a variety of colors such as black, sable, and tan.

3. Temperament: German Shepherd puppies are known to be loyal, affectionate, and playful. They are great with children and make excellent family pets.

4. Training: It is important to start training German Shepherd puppies early as they are intelligent and eager to please. Socialization is also important to prevent aggression towards strangers.

5. Exercise: German Shepherd puppies require plenty of exercise and playtime to burn off their energy. They enjoy running, hiking, and playing fetch.

German Shepherd adults:

1. Size: German Shepherds typically weigh between 50-90 pounds when fully grown.

2. Appearance: They have a muscular build and a thick, dense coat of fur that sheds moderately throughout the year.

3. Temperament: German Shepherds are known for their loyalty and protective instincts. They are intelligent and can be trained for various roles such as police work, search and rescue, and service animals.

4. Training: German Shepherds require ongoing training to maintain their skills and obedience. They thrive with positive reinforcement and consistency.

5. Exercise: German Shepherds require plenty of exercise and stimulation to stay healthy and happy. They enjoy a variety of activities such as hiking, swimming, and playing fetch. Regular walks and playtime are also essential for their well-being.