anastasia: My mistake,after some research I finally understand the term "working line" in regards to dogs as opposed to a cafateria
As far back as I can remember our family has always had our best luck with the most undesirable,scrawny weak link of any litter we have had our choice of.The last purebred we bought (other than adopting racing greyhounds) was a miniture shnauzer,and she was so high strung she trembled.