We had a week of dumping rain and suddenly I have some sick birds and a few have died. I gave the first few a shot of penicillin and then as the birds began to have symptoms that seemed like coryza I started adding Sulmet to their water. Some birds seem to be getting much better and are eating while a few have died. I don't want to just kill all my birds and start over. These are pets, expensive, and at the beginning of the laying season. I saw that there is a vaccine and I certainly wouldn't mind spending the $52 if I could vaccinate all my birds and then never have a problem with coryza again. The question is: How do I get a diagnosis and if they do have Infectious Coryza will the vaccine prevent any future outbreaks and keep them from transmitting the disease or will the vaccine only do what the disease is now doing...giving partial immunity to the survivors? Also, I have chicks of two new breeds that I wanted to add to my flock. These are still in the brooder. Should I vaccinate them and then will they be safe to house next to the rest of the flock? Thanks for any input!