and of course I cannot find the specific article
on top of my head reproductive cloning would give you the same dog , and for some reasons so far its been that most cloned embryos cannot develop into healthy beings
serious health effects: premature aging, short life span, increase in birth size, defects with immune system, defects in essential organs- liver, brain, and heart
that is as far as cloning
but also the study pointed out that actually using sperm etc would send us back in time , smart people from 3 generations back would be stupid today
due to the fact we create 3 generations in man very 100 years in dogs every 10 years it actually makes no sense to save sperm and or people cause every 3 generations the dogs and or human would bested out by the current animals or humans

some of my old friends in the dogs ben van hooten and peter parker have come to the same conclusion
ben van hooten has gone into whippets and whippet sperm from 10 to 15 years ago you wouldn't be able to give it away for free cause those dogs ran 23 to 24 now they run 20's
peter parker had sperm save from assassin and his son heckler , those he bred down naturally trough generation are far better than when he uses frozen sperm and he was one of the first to use it
I myself have frozen sperm of dogs from some years ago (some even 20 years old )

would love to hear your opinion
hence especially in a breed like whippets or greyhounds its easier to see progress than in our line of hobby
but check times call a few racers , none of them would be interested in sperm from dogs 20 years ago they would laugh in your face

whats your thought , feel free to continue in PM
cant believe I am talking breeding anyway LOL