Another thing. If the switching of feed or anything else suggested doesn't work too well, should I separate her off so she is in the other half of the run? I know all chicks are different but our neighbours got 4 ex-bats (2 died) so they got another one and she was introduced in fine? Of course, the chooks would still be able to see each other but not interact and peck! Will the affected chook get lonely if I do that? Or is this only for drastic action?