We are still pretty new to chickens. We have a flock of 5 young chickens that we raised from 3 days old. We want to add to our flock, so we recently purchased some young hens from a guy off of Craigslist. They were from a "Certified Clean Flock with no illnesses" and upon seeing them we thought they looked healthy. He also had Easter Eggers, so we decided to purchase a couple of those as well. Upon coming home and putting them in their temporary coop (we wanted to quarantine them for 30 days) we noticed they had diarrhea. Then we noticed one of the easter eggers had a runny nose! Being new to chickens, we did some research and read it might (hopefully) be dust and ammonia in the coop they were kept in. We couldn't really see inside the coop but it did seem rather dusty and strong smelling, and we read that the diarrhea could be due to stress from the move. The next morning we sent the guy a message, and got no response. Later in the day we found the two easter eggers bleeding from their tails. One of them had no tail to start with and the guy had said she was going through a juvenile molt. We separated them both from the rest. So we have 3 different enclosures for them. Today, one of the other 3 chickens has begun to sneeze. We still have not heard back from the guy. From what we've read so far, this could be a respiratory illness and it is contagious and requires costly treatment. We can't afford that, and are just completely at a loss on what we should do within financial reason. We don't want to return them to the guy, because we have grown rather fond of them, especially one of the easter eggers. She is a sweetheart and loves to be held. And we really don't want to return them to what we suspect was a bad situation. We would feel really bad. But at this point we have no idea what to do and whether or not they are going to get worse and die... I dont think we're just going to let this guy get away with taking our money and selling us sick chickens that we wont even be able to put with the rest of our flock. Need advice on what to do. We purchased VetRX but really have no idea if it will even work... Any advice is appreciated. Thank you!