We're hoping to either buy hatching eggs or day-olds this spring (late March), and for a variety of reasons I can't have chicks in the house under a brooder lamp this spring. I'm hoping to slip them under a broody silkie and have her do the work. If we get day-olds, is it still too cold in late March for chicks to be outside if they have a momma hen? The average temps in our area in March are mid- to high 50s during the day, high 30s-low 40s at night.