I have 25 six week old Isa browns in a brooder in my garage with a heat lamp. They seem to be fully feathered and I want to move them outside so I can get some more chicks.I already have 7 hens and 2 roosters as well as 2 turkeys that live in my barn stall I converted into a bigger coop but I was thinking of moving the chick's in to my original pre fab coop until they are a little bigger to join the adults. It's only rated for 6 adult birds but it's not their permanent home and I figured the small space would be ideal for them warming each other up. But my problem is that we've been having a cold snap in Michigan and it's in the low 20s and getting in the teens at night for another week probably. Is it too cold for the chick's to leave the brooder just yet? Another option is to put them in a large dog crate in the barn with the other chickens and put a heat lamp on them but it's a little smaller than the brooder and I don't want to crowd them too much. Should I just leave them in the brooder another week? What are some thoughts on this? Any advice is much appreciated since this is only my second time raising chick's and never so many before.