Hi! My husband, two son's and I just finished building our coop and adopted 6 girls that were born 5/10/10. We are new to BYC and just love this site!!! So much great info! We were wondering when the girls will start using their ramp to go into the coop! We are in Woodland Hills, CA so it's not too cool at night and the girls slept outside all night. We didn't know if they need to be taught to go up the ramp, if there is an age that they will start doing this and if we should get a dog house or something in the meantime for them to sleep in on the ground. Thanks for any help and advise!