Ok, so when the time comes I need to know which pair gets along better. Harley is going to be fixed this upcoming month and sometime in the future I am planning on buying another yorkie to become his play mate. My question concerned which sex will get along better together? Male (fixed) & female(unfixed), Male (fixed) & female (fixed),male(fixed) & male (unfixed) or male(fixed) & male (fixed)? So confusing but I'm sure you guys catch my drift!