Can anyone tell me about how old my four newest babies are?

[EmmaRainboe]

I bought these four at TSC and of course they don't tell you anything about them. Any one have an idea of about how old they are?

They look five, possibly six weeks.

The barred bird at the back is a cockerel. The two in the front are pullets.

The barred bird hidden behind the twig I'd guess is a pullet due to the what appears to be single barring, but full pictures would help.