Same as a herd of cattle, if a bunch of them get sick in similar ways you change your process to one where you can find out why. But just one? Shoot it and bury

Same as a herd of cattle, if a bunch of them get sick in similar ways you change your process to one where you can find out why. But just one? Shoot it and bury it. Then keep an eye out on the rest in case it's a developing pattern.