When I first had William he wa not on his own I also had whippets but he didn't settle until he had one of his own kind to be with. Not that he didn't like the whippets he did but they just were not the same as him. I know it sounds daft as he had company but William had servere seperation anxiety. Now he hs Button he is a lot better not perfect by a long stra but he is better than he was