Apparently, 1 out of 4 Americans say they have been part of an abduction, according to the documentary I watched with Dr. Leir, and these implants seem to be placed with the intent of not being found. It is kind of scary to wonder how many of us have been implanted, but perhaps there will be a guideline to detect and remove them with more research in this field. I have not studied implants found in animals, it seems like most alien implants found have a tendency to dissolve or disintegrate without a proper environment so I guarantee if one was found, it probably did not last long.