The Eglu Go UP house is suitable for chicks over the age of 12 weeks. We recommend you remove the roosting bars from inside the coop until the chicks are big enough to perch and walk across the bars safely. The Eglu run is not suitable for chicks under the age of 12 weeks without supervision due to risk of escape and predators. Chicks may struggle with the ladder to begin with while they are small, so you may wish to lift them in and out of the coop yourself, or convert the ladder to a ramp. You should use plenty of bedding in the coop to keep the chicks warm, and change the bedding every few days.