My five chicks are 3 weeks old. I am using an old baby pen with poster board up on the lower half of the sides to prevent drafts. I think it's about 3x3. I have screens on the top t prevent escapees. AS they are getting bigger FAST - I'm wondering if this is going to be big enough until I can move them outside. Really hoping it is! This picture is before the chicks arrived so I hadn't yet put in the shavings or screens on top. Any thoughts on whether this will get us through until we are able to move to coop?