I purchased about 20 chickens from an individual on craigslist. They are egg laying age. As I am putting them in my car, she tells me she noticed one of them sneezing. Thankfully I built a quarantine pen. Because a lot more than 1 of them is sneezing. I put them on corid as soon as I got them home. I think I need to get them on some antibiotics for the sneezing. Can I give antibiotics and corid at the same time? What else would you recommend? Vet RX? If sho how often? TIA