|>>|| No. 64274
Slavery only went on for 246 years which is 12 generations at most (nearly twice that if you ask the /lab/ paedo but lets stick with that) with a pretty small genepool to select from. ("according to the Trans-Atlantic Slave Trade Database, 12.5 million Africans were shipped to the New World. 10.7 million survived the dreaded Middle Passage, disembarking in North America, the Caribbean and South America.") Compare that to chickens which have been domesticated between 8,000 and 10,000 years. They can reproduce at about 18 weeks with some variation, lets call it 20, so 52*8,000/20=20,800 generations with a huge genepool ("in 2002, the United Nations FAO estimates that there were 19 billion chickens in the world, with China having the largest number, followed by the US, Indonesia, and Brazil. By this calculation, for every person in the world, there were three chickens. By 2009 the global chicken population was estimated to have climbed to 50 billion."). Look at the original wild chicken ancestor (https://en.wikipedia.org/wiki/File:Gallus_gallus_female_-_Kaeng_Krachan.jpg) and compare it to modern chickens (https://en.wikipedia.org/wiki/Chicken#/media/File:Hen_with_chicks,_Raisen_district,_MP,_India.jpg), the difference is actually not a lot. It's notable but it's a 1,733x greater number of generations. There's no evidence to show that anyone was breeding humans with any more deliberate breeding plan than they have been doing for chickens, in fact the opposite is true as The Origin of Species was released only about 30 years before the abolition of slavery in the US but we've been breeding chickens continually since then. We can conclude that there just wasn't enough time to make any significant difference and that we learned some facts about chickens today that we don't really care about.
Even if we assume the absolute most human generations from those 246 years, 246/14 = 17 and the most conservative estimate for chicken domestication of 5,000 years with the oldest a chicken can lay eggs (anecdotally there's mention of one 17 year old chicken that could still lay eggs) that gives us 294 chicken generations to 17 human ones, which is coincidentally also 294/17 = 17 times as many chicken generations to human ones. I find it hard to believe that would make enough of a difference.