In spite of the tragedies and the heartbreaks, because you are so meticulous, I would be looking at this all with the understanding that had you been someone lacking in any area of your farm/stewardship or not having the knowledge and the dedication to look at everything to find the answers it will perhaps save lives. I feel you are a pioneer in animal husbandry for perhaps many others who ever come across this type of issue in the future. (((Hugs))) and even tho we all have a heavy heart for and with you in the end the animals did not die in vain but have become studies for others to perhaps prevent this from happening again as we all adapt to whatever comes at us.