Totally agree. That’s what I meant by “could get worse.” I should have been more clear. But I also think the pine tar would be worth a try, especiallly if OP can supervise a visit.She may need to regrow those feathers before they completely leave it alone. Certainly while there are scabs she is liable to get pecked. The problem with 'occasional pecks' is it only takes one to draw blood and that will cause a feeding frenzy. I would keep her separate as you are - a crate within the coop, until the scabs heal over. That shouldn't take too long at all.