Sounds like the chicks may have spraddle leg. That is a nonhereditary problem that can be fixed by taping their legs in the proper position. Band aids work very well for this problem.
The chick looks like it may be a Mottled, but what tells the tail is whether they have what looks like a tuxedo, darker body color and white bib all the way down the front and your other chicks have to be Blue if they are from a Splash/Black mating. The dark one just may be the Navy Blue that you are hoping for.

My cochin eggs hatched! Now my questions is What color? I read Splash to black gives you all blue. But i have one that looks like black..
The one in the front is quite a bit darker... Is it still blue? And the rest are blue correct?
(the pasty butt was cleaned after the pics)
Now i think this one is a mottled. But the reason i am asking is because all the rest of my mottled chicks hatched with the same leg problems. They all have there legs sticking out in front and cant walk. Is it cuz they where pullet eggs?
NPIP# 31-422 Bantam Cochins - Blue/Black/Splash, Birchen.
It came to me that every time I lose a dog, they take a piece of my heart with them, and every new dog who comes into my life, gifts me with a piece of theirs. If I live long enough, all the components of my heart will be dog, and I will become as generous and loving as they are." - Cheryl Zuccaro
NPIP# 31-422 Bantam Cochins - Blue/Black/Splash, Birchen.
It came to me that every time I lose a dog, they take a piece of my heart with them, and every new dog who comes into my life, gifts me with a piece of theirs. If I live long enough, all the components of my heart will be dog, and I will become as generous and loving as they are." - Cheryl Zuccaro





























