I've crossed some Black Copper Marans with New Hampshires, all the offspring had feathered shanks. Also crossed some Wheaten Marans with Araucanas - All offspring had very lightly feathered shanks. And, even more, I crossed some other Black Copper Marans with Ameraucanas - Half the offspring had feathered shanks. I would say it depends on how heavily feathered your Marans are to begin with.
I'm getting 100% feathered shanks from our Black Copper Marans Roo with Ameraucana Hens some have more feathering than others but it's easily visible.Our roo has real heavy feathering though compared to my Blue Coppers and some of my Black Copper hens.
It depends.......you can get all offspring with feathered shanks but in my opinion you will probably get some of both in the first cross. If you do get both and you want to continue breeding this cross for feathered legs you simply cross the feather legged offspring back to the feather legged parent, second generation should give you all feather shanked offspring but feather legged birds have 2 dominant feather shanked genes and one recessive so it is very possible even in the second generation you can get some clean legged birds. Have fun!
