I had bought 6 chicks from Tractor Supply about a week ago, and a few days ago one started to sneeze and sound congested. The next day we added 6 more chicks to the batch before we realized it was something that could spread, so now we have 12 sneezing chicks. Only 4 sound like they are congested and have rattled breathing at the moment. We have been putting VetRx in their water hoping it will help, but I have read that it only helps antibiotics. Which antibiotics should I be using? There is no way for me to get Tylan, considering it is so pricy, so all I can do is go to Tractor Supply and see what they have. I heard that I should use Terramycin and Duramycin, but I don't know which medications those are in and which ones can be used on chicks.