I picked up 6x 3 week old broad breasted white poults, today. Is 3 weeks old still too young to put out in a tractor in the yard? They have been kept in a basement that doesn't get over 60 degrees F. They are mostly feathered and I have a tote laying on the side with pine shavings in it. They are all laying inside the tote. It is in the mid 50's here during the day and getting down into low 40's at night, maybe high 30's. The tote will protect them from any direct drafts and the tractor has 1 entire side covered to block drafts, as well. I feel they should be ok but, for some reason, I'm having second thoughts.