I recieved chicks on Friday of last week and they were so cold. Six of the 14 died in shipping. Since I have gotten rid of the meat birds, but my Light Brahma and the three Speckled Sussex have been sneezing. It was not much at first. I added three more chicks to the brooder as well. As I am sitting here the Light Brahma is on my shoulder and I can hear her breathing and she sneezes a lot. The other chicks are sneezing as well, but not bad, but there is definitely discharge with the sneeze. What could this be and what can I do?