[sussexchook]

my 3 bantam  chicks i have are around 7 weeks old when can i stop feeding them chick crumbs??

[kegs]

I'd start gradually introducing the growers pellets now.  Mix it in with the crumb and gradually increase the quantity of growers over a week or two until it's all growers.

It's anywhere really from 5 to 8 weeks depending on which web site you read! 

[sussexchook]

what about mixed corn as i feed my older birds a mixture of pellets and corn

[JaK]

You don't need to give them corn at the moment unless you plan to use them as table birds.