So we have 2 chicks from the incubator, now 6 weeks and in a brooding box. The b.box is inside one chicken coop which is also housing one (part polish) hen and her 2 chicks (now nearly 2 weeks) . The plan was to let the2 older ones out with mum and chicks today in the coop (which is about 5 sq mtr) but it didn't go well, mum attacked one of the chicks (we think a cockel) so we put them back in the brooder. Currently they can't see each other (brooder is opened with grill at top), but mum and chicks can see the rest of the flock ( a grill over the access door to the run) . When can I put anyone in together, and how to do it? It's summer here of course, and holidays approaching. Will I have to get them tended to separately?