we just got 5 new chicks to keep another pullet (whose 3 sisters were all killed a few days ago, I posted about it earlier and am so heartbroken) company. Unfortunately I was so eager to get her some new friends that I combined them right away and it was a total disaster : ( Our solo pullet is 12 weeks old and the woman who sold us the new ones said they were 7 weeks which was the oldest (non adult) chicks I could find right now. They have a barrier up in the cage but my older girl is so aggressive to all the new chicks. Plus I didn’t separate them to quarantine before combining them. I feel awful, if I lose this last girl of the original small group of pullets I will be beyond heartbroken. Is there anything I can do to minimize infection at this point? What are the chances something will go wrong health wise?