When our two german shepherds, Kane and Jax, were younger we kept them apart quite a bit for training. Now that they are a bit older we don't seperate them at all and they are the best of friends. My SD and the 4 year old GS have moved in with us and will probably be here for at least a few months. Jax is ecstatic. He adores the GS and they play together non-stop from early morning until late at night. Heaven help the person that tried to hurt the child with Jax around. Kane is visibly depressed. He likes the little "being" okay, but he's not interested in playing with him all that much. Kane misses Jax and their play together. I feel so bad for Kane. Other than giving him extra attention I'm not sure there's anything I can do for him.