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					Originally Posted by Desire123   I've heard that female yorkies are much more stubborn and difficult. | 
 
  I have only the one Yorkie so my experience is limited. I have a female that will be 7 months tomorrow. She has been harder to housebreak than other bigger dogs I have had but then I heard that was a Yorkie/toy breed issue anyway. She hardly ever pees in the house now and never poops 

. Every other thing I have tried to teach her she learns in about 10 minutes. (She has learned to beg particularly well I am noticing right now as she is intently watching my husband eat some chocolate -- don't worry he won't give her any). She even goes where I point without my saying anything already and I didn't try to teach her that. 
I guess my point is that I believe terriers in general are willful. Some might be down right stubborn especially if it works for them. See my dog that begs for example 

. Some are smart and some not so much, and I don't think sex has much to do with it. 
Beth