Barry and Karrie are discussing their pets during poker game. Barry tells Karrie that he has at least one dog at home. When Karrie asks which bread , he answered cryptically: If have a labrador and not a staffie, I also have a collie. I either have both a collie and a staffie or neither. If I have a collie, then I also have a Labrador. What breed or breeds does Barry have at home?