Has anyone contacted Greenfire about this problem and their responsibility in this tragedy? It seems they should be taking some precautions or maybe are not aware of the problem. Do you know how it begins? Any cure for this LL? Can it be detected before killing off the whole flock?
You should be careful about assigning "responsibility for this tragedy" until you're certain of the origin of this disease in a particular flock. We raise many cream legbars each year. We have seen no symptoms of lymphoid leukosis in our birds, and as part of the importation process our birds are extensively tested by the USDA.