I have a one month old Silkie who has been separated in my coop with her (I hope) momma. I let them mingle a little when I free range (supervised) and they all basically ignored her. I stepped away to fill a feeder and came back to an injury behind her neck that was bleeding. I don't know what happened but guess someone pecked her. I have 2 roosters and 8 hens who are about 10 months old. I cleaned her injury and have been putting triple antibiotic ointment on it. She seems to be fine. What is a safe age to let her join the flock? Thank you!!!