i had a german shepard one. i got him after i hat my yorkie. my yorkie liked him until she noticed that he was getting more attention from being the newer dog. you will want to pay more attention to the sheltie then aventually give them equal amouts of love.
german shepards are wonderful dogs,but are wild sometimes.they are soo smart mine knew how to take his coller off!
after that we changed his name to hoodeennee