hi, i have just got some chicks from my daughters school that needed a good home, we have a good general idea of how to take care of them and they all seem to be doing just fine, but i just need a little guidence on how to keep them healthy and happy, they r only just over a week old,in a brooder with a lamp to keep them warm.how long before i can but them outside,lay eggs ect, your advice would be appriciated greatly. many thanks szy.cpr