Two weeks ago I successfully hatched my first home grown eggs. The new baby chicks are just starting to feather out. They are all sexlinks. I am thinking of starting my next round of incubation. If they were to hatch in 3 weeks, my first clutch will be 5 weeks old and not yet ready to join the group outside (plus it may still be a little cold for them). If I were to separate the new hatchlings from the 5 week olds for about a week, could I keep them all together after that? That brings on the general question, for baby chicks what age groups can be kept in the brooder together.