Question is can they prove it? I work a female but I know if I take 10 females and 10 males Im more likely to find a stronger dog in the male group.
If you have a truly strong proven female she is worth her weight in gold.
Such shy animals are in all circumstances an encumbrance to their owner, who must be ashamed of such a dog, and a disgrace to their race. Under no circumstances whatever must they be used for breeding, however noble and striking they may appear.