Why are owl pellets fumigated?

Looking at the top Google search results for buy owl pellet, it appears that many commercially available owl pellets are now heat-sterilized, not fumigated. The purpose is to kill bacteria and insects. read more

How: Put the pellets into a polyethylene bag ( use gloves). Pour some of formaldehyte into a bowl. Place it into the same bag. And the last step put KMnO4 ( I don't any idea how much the reaction needs) to the bowl. And tie the bags mouth. Keep the bag closed and temperature 25-30°C for two days. After the two days pellets are ready to examination. read more