This is a gem of an answer --- a good breeder has a goal and pilots each generation " So if they breed Ingo for a certain characteristic, eg solid nerve, or big head, or whatever...they will select that characteristic in the puppy that shows it best. Next they breed that puppy and the line goes on. This kind of breeding selectively enriches for a stud's dna and soon it may become fixed. OTOH a random breeding where Ingo is in the 8th gen, is just that random. If you are lucky, you may hit the jackpot, though the actual DNA contribution from the 8th gen Ingo in a random breeding is 0.39 %. "
It is the selection for a type and that goes beyond conformation , extending to behavioural and inherent deeply seated instincts , which include herding (border), and fight drive, desire to work -- they are just THERE ready to be used , or not.
great insight guddu