Nope, they are older, do not know the exact age but 2-3 months and up.
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Unfortunately, the seller did not spend much time on them, and they just went to bed in a barn where there pen was (they do not come out), so they also had to learn to go to bed inside the chicken house. And not just sleep on the ground in the pen. They learned that already after day 2, now they go well into the house at night.
On Friday I get a beautiful orpington pullet, she is 4 months - and from a register breeder (she has a ring on the leg) hoping she can guide the slightly confused other hens.