> This is what perplexes me, surely it is much more of a gamble to buy in a pup to bring up to use possibly once, with your bitch? And much more expensive to boot, than paying for a top class proven stud dog of the right lines.
It will of course pay if they simply intend to mate the same pair or the dog to all their bitches to churn out puppies, not ethical or responsible breading practise at all.
Repeat matings (I hold my hand up I did one once, but the first litter was only 4 pups, an the two litters came to 11 puppies) do not help a breeds gene pool at all, unless of course the first litter none were used for breeding but turned out so well the breeder wanted to repeat so they could use the line.
Also influence on the gene pool cannot easily be forseen based on number of litters or puppies any given dog has.
A dog could have one litter, and have a couple of successful offspring or grandchildren and end up being in too many pedigrees. another dog may sire a lot of puppies but few if any are bred from.
Our own import sired 8 litters in this country (not a huge amount one would think) and one abroad, yet at the moment a high proportion of dogs in the ring and used for breeding/potential breeding stock have him as sire, or grandsire and even great grandsire, and there have been a few litters where he is in both parents pedigrees.