Yes the 6th is on the 5th.... Strange!
Yes I think they are from close blood lines as another from the same batch can't really see and is a bit odd. Shame really as I'd of liked to have hatched out some of their eggs!!
This is right up your alley friend....a Silkie thread!!!
We call 6 toe chickens FREAKS where I come from but it does make for an interesting conversation piece!!! Bet it would still make EXCELLENT "black skin" chicken soup....the Asian's believe it has healing properties, it certainly tastes different to me and the meat is blackish, too!!!
I'm a silkie lover too! Mine have 5 toes but six is very cool! Different! I could not really see the sixth toe in the pic, is it smaller? I was reading that sometimes if it's incubated at a incorrect temp it can cause strange little occurrences like that to happen. Also could be inbreeding like stated above. He really pretty and special! I love the color! You got one special boy there! How old is he?