I would like to get a brother or sister for Casey. Casey is a 2 year old male. Is it best to get a male or female? Should Casey do the choosing? Any information is appreciated. I have been told by many, family and neighbors, that Casey is a special dog. He is happy, fun, smart and does not randomly bark. He only barks when the kids are on the trampoline. I knew that this breed has a tendency to be yappy. I did discourage random barking except while play time. Any info would be appreciated. Male or female?