Cassiadawn, That should work just fine...mine are in a brooder box just like that only a little smaller (see back a few pages...85 I think?) and I have only 5, but mine are also over a month old now and they still have room. Now I have added 2 roosting poles and they're taller so that significantly cuts off some space, but they're still fine for space and they're much bigger than yours will be in two weeks so you shouldnt have to worry. Good luck!