Tango is almost always mistaken for being a male dog, I don't know why, maybe its her coat colour? Maybe its her name (Tango is seen as a male name it seems)? She looks pretty feminine to me, but maybe that's just because she's my dog. I rarely have anyone know that she's female unless I specifically tell them (and even then, some people don't seem to 'get it'!). Morgan is sometimes mistaken for a male, but not often. Winston or Tia never are. It doesn't really bother me, just kinda confuses me sometimes I guess. So, are your dogs every mistaken for the opposite gender?