I have black hens that eat black licorice.
Sue, I have some funky all black hens. I have no idea what they are. Eyes, comb, beak, skin, all black. No, not Silkies. Someone butchered some surplus roos and said their flesh was black too (he threw them away thinking there was something wrong with the meat) So if you're partial to some black mystery chickens, I can send you some eggs and you can see if you get any of the all blacks to hatch. Feeling adventurous? You know where to find me and my mystery hens.
Oh, should add there is a heavy Australorp influence in these birds, although all black is NOT an Australorp trait. I have been impressed with my AUssie hens.