We have a flock of Bovans that are about 18 months old. We bought them from a chicken laying house. We got them to replace hens that we lost this winter. About a week ago one of them started bleeding after laying. I removed her and put in a pen by herself. I applied antibiotic ointment to her vent and she has healed. Today I decided to put her back with the others. The others started chasing her and one began pecking her. Any suggestions on getting her back with her flock? I need to do it soon as we want to put this flock with the rest of our hens.