You are so sweet. I am sorely tempted. But if we do the calendar math I'm afraid it is too late in the year.
21 days from yesterday is October 13. 6 weeks to feather them out and get them big enough to tough out some cold weather puts us at November 24. Now we could be lucky and have a mild fall but it can also snow on October 31st.
I do not have supplemental coop heat.
The average high in November is 53°F (11.6°C) and the low is 36°F (2°C) They would be 2 and 3 weeks old in November.
What does everyone else think? I feel that's too cold. Then I'm thinking about integration in limited space due to snow fall. And of course poor
@Dona Worry and her frost bitten pullets comes to mind. I just don't think it is worth the risk. I'm sure she will want to hatch again.
I am thrilled that Mal wants to do this. I love the idea of momma hen and babies wandering through the yard. The thought of watching her raise them makes me all warm and fuzzy inside.

I just want to do it under the best conditions I can.