what breed this 4 chicks

[Aziza]

Hello everybody, I received some eggs from a friend, they where posted and then flew in to us in Nouakchott. From 21 mixed eggs medium/ big size only hatched 5. Have no idea what they are, I have numbered the photos and Nº2 I guess it might be a Brahma or a Cochin. Number three was a round big blue egg and he/she was born with the neck skin balloned with air inside, it looks better today, I guess it might be a Cream Legbar but never saw in your photos this coloring and one line only from head to end of back.
If you could help me identifying I would be very happy. I opnly have Bantam's and I believe those chicks might be medium or big size.
Two of the photos with the mother that took care of them.

 

[oldhenlikesdogs]

Looks like a black cochin, and a naked neck. Not sure on the two lighter ones.

 

[Aziza]

Looks like a black cochin, and a naked neck. Not sure on the two lighter ones.

Thank you, you confirmed my thoughts for the dark ones. I don't think is a naked neck , the chick had her skin around the neck swollen like a balloon of air at birth now the air has gone and I hope feathers will grow. It was born from a blue pastel egg

 

[Aziza]

Thank you, you confirmed my thoughts for the dark ones. I don't think is a naked neck , the chick had her skin around the neck swollen like a balloon of air at birth now the air has gone and I hope feathers will grow. It was born from a blue pastel egg

Good morning from Nouakchott, You're right its a nacked neck probably crossed with a Cream Legbar or another chicken that puts blue eggs. The hatchery from where the eggs came doesn't publicise that they have Nacked necks and as she had this ballon of air I thought it had lost her feathers, but I looked at her bottom and from both sides there are no feathers as well.
Thank you very much