Various Cockerels Need Proof of Breed

[Rach92]

Hi,
I had a mixture of eggs hatch at once and now they’ve grown I can’t remember what the breeds of them are, just that they are all cockerels. Can you help determine the breeds. Thanks.

 

[Cloverr39]

They don't look like purebreds to me, they look like crosses of various breeds.
The first one looks like a blue laced red Wyandotte mix. The red one might be cochin mix, though I'm not sure. The last two look like Marans mixes. I'm not sure about the barred and the blue one.

 

[ParanoidAndroid]

The all Blue one looks like a Blue Jersey Giant to me. But I'm not an expert.