Howdy from oregon.

[frankedevereaux]

Okay so my chicks are fully feathered I have 5 light brahmas and 5 black stars is this coop too small for all 10 of them

They are roughly 5 or 6 weeks old

 

[DobieLover]

Okay so my chicks are fully feathered I have 5 light brahmas and 5 black stars is this coop too small for all 10 of them

Yes. It is too small for 3 of them.
Do you have an old shed or outbuilding you can convert into a coop?