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During the first year of their lives, Greyhound pups live together with their littermates.
During this time, he will not interact much with anyone other than his mom, including his littermates.
At this point, his vision is blurry, but he is listening more and will start interacting with his littermates as well as his mom.
By four weeks, the puppy will be more aware of his littermates and any humans around him.
German Shepherd Dog puppies kept confined during growth developed less severe hip dysplasia than their littermates which were allowed to exercise vigorously.