I have been having trouble with sick birds, which started in a poorly ventilated coop with moisture buildup. I had just about given up hope (all blood tests are negative except for virus isolation which aren't back yet) and read somewhere about Viral Pneumonia - What is it? Do the birds become "carriers"? Will it pass on to the chicks? What are the symptoms? It did sound in a lot of them like water in the lungs. Is it something they get and get over and don't pass around after that? ANY HELP AT ALL GREATLY APPRECIATED!!!!