Nice experiment.
How is anyone supposed to know if the meat (other than kosher) they buy at the grocery has been bled properly? And what about hot dogs, luch meat, and sausage? Some of that stuff is made of ingredients you don't want to think about.
Stop reading now if you like chicken soup and are easily grossed out.
I remember several years ago an egg company in my area had a roof collapse on one of its stadium sized hen houses. Thousand of chickens died. According to people who worked for the egg company, the Campbell's Soup company bought all the dead chickens and trucked them off to a soup factory. Were those chickens properly bled before being processed into soup?