how long should I keep chicks in brooder?

I took a chance and ordered hatching eggs from Germany. It is a far travel but so well packed my friend whom sent them told me not to live in hope. It took six days to arrive at our home by parcel post express. Something to do with security control? We duly placed the ten Cochin Pekin bantam eggs from out top breeders show stock bantam flocks. The incubator set and off we went. We hatched just four and one of those disabled from the egg. I have been breeding hens all my life but first time with buff Pekin bantams. It was really sad as the little chap has no power in his legs and thus cannot stand up. He tries so hard with a wish to live.I know it is best to finish it but each time his efforts to stand give him a chance in my mind. He drinks eats and chirps happily. His heart beats with power yet his legs drag behind him crippled. It is a nightmare for my wife and from now on I will pay the price for pullets ready to lay. Trouble is we are not in the country where Pekin (cochin) bantams exist,so as an ex pat Brit living in Europe it is hard to find stock. Germany or England have the best top breeders but will not send hens by road so that was why we had eggs in the first place. Back to the drawing board searching for the right birds and transport.

Great answer. I have 10 new chicks and 3 grown so I need to segregate them. This will make it easy.

I lost a chick to a cat this spring. I did my best but fluffy lived 7 days and died. hang in there.

wow that was helpful I like your profile pic

What the Hell? 6 weeks for some people?
I live in Florida but the crossbreeds I developed only require 4 nights in the brooder!
I do give them a heating pad at night when I move them to cages in the goat house but they frolic in the goat house all day, consuming mass quantities of food and treats.
My main objective is to make all my birds as happy as possible, so if this was stressing the chicks, I would immediately place them back in the brooder but you can tell when a bird is distressed. They remain motionless and sound off with a loud chirp.
My birds never do more than utter at soft chirp as they're joyously flitting around.
Mutts for the win.