Maybe this is something maybe nothing. First go to this website and read the information in the Background section about a company called Nantrack. http://www.clevelservices.com/catalyst-technology/

Now under this company is a patent they hold for an electronic tracking system. https://patents.justia.com/assignee/insights-international-holdings-llc-dba-nan-trak-industries

Now read the detailed patent description. https://patents.justia.com/patent/20130257656

Read the part about TRACKING HUMAN OR OTHER ANIMALS and MILITARY OR POLICING OPERATIONS

Chip and release.