Well, it is "proven fact" that when one monkey learns to crack a nut, tells five more, then all monkeys in the world simultaneously can do it. They spread the knowledge from their tribe-to-tribe traveling monkey overseers.
A lot of witnesses I knew actually kept chicken-pens in their yards for a while on the chicken blood thing. After they got sick of the mess, the smell, the disgusting process of butchering them, etc...guess what?
It got decided that "store-bought chickens" were suddenly being processed a "lot better now".