How do you know when chicks are "fully feathered"?

[BBSnavely]

I have 6 barred rock pullets, about 5 or 6 weeks old. They seem mostly feathered out but still have some fuzz around the neck. They are in a crate in the garage but stinkin it up! When can i move them permanently out to the coop? Already getting down to 40's and 30's some at nights here in Missouri.

 

[jetdog]

I waited until they were 8 weeks and even then they had the fluffy stuff around their heads.

 

[mamacita0804]

I am not sure the age or breed of my chicks, However they started stinking up so I did my research and tried putting them outside - I'm in process of building a coop so for now they using dog house for 'warmth' - I'm in Texas and it gets low 40s at night, not only my chicks are doing fine w the cold but they seem to be so much happier outside.