I have 7 baby chicks that are just over 3 weeks old. They appear mostly feathered out though still have fuzzy fur on tops of heads and chests. Weather here is running upper 80s-mid 90s daytime and mid to low 70s at night. At what point can I move them to the coop with my 7week old chicks. The first batch seemed to feather out much faster but with temps outside so warm I didn’t know if I could move this group out sooner. Thanks for any info.