It is a crap shoot. But less of a one when you know genetically what the puppy should be predisposed to be like. This is why people in general like proven lines. Kat was a horrid puppy, but matured fantastically. If its in the genes its a much safer bet.
Same reason people pay big dollars for horses from proven lines, its still a crap shoot.. but much better odds than going to an auction and buying a random pretty and well behaved foal.
Same reason people pay big dollars for horses from proven lines, its still a crap shoot.. but much better odds than going to an auction and buying a random pretty and well behaved foal.