Hello everyone. I'll be getting my 4 buff orpington chicks on march 11th, and currently plan to brood indoors for first 4 weeks in a small unused bathroom basement level. At 4-5 weeks id like to move them to the coop if i can, even if they remain in a brooder. I realize they will still need a heatlamp mid april in Massachusetts at 4-5 weeks of age. Is this ok to do? Even if we happen to have a cold April?