@Birdrain92 is correct that chick has green blood in it.The crest, beak, and barring pattern is what gives it away. It could take a while longer before one can definitely sex this chick visually because green blood changes the usual indicators when compared to India Blues. Post more pics in a...
3ea beautiful roosters, congrats!! If indeed they had a BS parent that makes them split to bs. Black shoulder is pattern, meaning both parents were of the India Blue species with mom being of the India Blue black shoulder pattern (IBBS) and dad is of the natural "wild" pattern (IB). You can put...
If the green blood is if higher % it can make sexing them early very tough and throw all expected colors off as well. Greens can look female up to around 12-18 months and even experts can get the gender wrong. After closer observation of your chicks Im leaning towards a pair with the rooster on...
Just an observation, Do you know if they are spaldings? The one on the right looks to have a touch of green due to the white tips on the end of the tail and the dark legs. Gerald Barker
I agree about the oyster shells for needed calcium. I also supplement all of my bird types with calcium while they are laying and sparingly when not. This may also be a wives tale but, I have heard that a lack of calcium can lead to feather plucking so I have always used it. Now, to be honest...