If you have a German Shepherd puppy that is smaller than its littermates, it's best to consult with a veterinarian. There could be several reasons, including:
* Genetics: Some puppies are simply smaller than others due to genetics.
* Nutrition: If a puppy isn't getting enough food, it might not grow as large as its siblings.
* Health issues: In rare cases, a smaller size could indicate a health problem, such as a hormonal imbalance or a developmental issue.
A veterinarian can examine your puppy and determine the cause of its smaller size, and provide advice on how to best care for it.