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There's nothing about them that makes me think they're not Australorps. Others with a better eye might know better.Thanks everyone for the great advice.
I think they are Australorp chickens based on my limited research but let me know if you think otherwise.
We open the doors when we get around to it in the morning so anytime between 6 a.m. to 9 a.m. and they put themselves back at dusk. We come by and lock the doors later.I let them out for the first time this weekend around 3:30pm and they came back around 4:30pm with no problem.
How long do you usually have them free range for?