Does anyone recognise this breed?

[Hawkesy]

Hey folks, we hatched chicks around 5 weeks ago but still have no idea which breed they are. We were given the eggs by a friend who has various breeds but is also unsure. Does anyone know?
(The first image is at a few days old where as the others are 5 weeks)

 

[donrae]

Mixed breed birds. Mixed enough no specific breed stands out, except there was obviously a black bird in the mix, and the most common black bird is an Australorp.

 

[Free Feather]

Yeah, looks like Australorp was mixed in - mutts.

 

[Toddrick]

They are definitely not black sex links. A couple are cockerels.

 

[21hens-incharge]

Barnyard babies there. Neat looking mix whatever went into making them.