a dog is a complicated combination of genetics for all the different purposes .
There are a great many concerns and lectures , Oirschots for example, and the Canine Diversity study , which ring the bells of alarm saying that "purebred" as a concept , which is historically recent in all animals whether farm or companion, is nearing an end because of the narrowing of the genetic diversity and problems being concentrated.
Lab rats are a result of extremely narrowed genes - and they are themselves isolated specific strains such as Wistar or the Sprague - Dawley . They need to be bio-identical as much as possible to provide for a common base with which to work.
Horses- the Rocky Mountain that I mentioned which I have had and did a few mentored breedings , has changed quickly when it suddenly exploded in popularity (just like the GSD ) and when colour had a $$$ premium (chocolate with flaxen mane and tail -- just like the GSD black and red) breeding became prioritized to getting colour , and temperament - changed , and because of closer breeding the Rocky Mountains now have terrible eye problems.
I no longer bred because I did not want to contribute to the greed - commercial side of things. When I was breeding the young horses would go to Pleasure Valley , a trail riding outfit .
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