Where'd the 'Brood chicks 6-8 indoors then move outside' method come from?

[nuthatched]

I've personally never waited that long to put my chicks outstanding, mine being out by 2-3 weeks. 3 being this year when it snowed unexpectedly.
I know that it's nice to have them full feathered but they feather in much slower indoors.
Mine are 5 weeks old, and roosting with the flock, feathered in and off heat.
I don't think I'd have chickens if I had to brood the poopers inside for two months.
I can see how climate could play a part, if I was brooding babies and its still snowing outside but even then, two months seems a bit much.

Any thoughts?

 

[MysteryChicken]

I've personally never waited that long to put my chicks outstanding, mine being out by 2-3 weeks. 3 being this year when it snowed unexpectedly.
I know that it's nice to have them full feathered but they feather in much slower indoors.
Mine are 5 weeks old, and roosting with the flock, feathered in and off heat.
I don't think I'd have chickens if I had to brood the poopers inside for two months.
I can see how climate could play a part, if I was brooding babies and its still snowing outside but even then, two months seems a bit much.

Any thoughts?

I've had chicks feather out very fast indoors(Brooder), & out(Broody Raised). Currently I've got some one week olds that already getting in breast feathers, which usually start coming in around 2½ - 3 weeks of age.

 

[Cindy in PA]

I have almost 5-week-olds that are just about integrated with the hens. They have survived in the coop since day 1 & had temps as low as 26 at night their first week. They have a brooder plate but have survived some really low temps this year! They are all but fully feathered & healthy so far.