But that reminds me! I'm thinking of vaccinating my own birds for Mareks in the Spring. They have come out with a new vaccine that is not supposed to make your bird a carrier-- but sheds out in the first couple of weeks and then they will be okay and be less likely of catching it, and will not spread it themselves. I need to read more on it and have not bought it because I don't know enough about it and no one has been able to link me to any of the studies done on that vaccine and I don't want to just buy it without knowing exactly what I am doing. But the horror of losing your entire flock of birds is something I do not want to encounter.