So long story short, about 5 months after my boy Munchie was microchipped my husband was petting him at night and felt a bump on his neck, I turned on the light and it was his microchip, he essentially developed an abscess around it and 'spit it out'. In talking to the company and research online, I figured out it was his body's way of rejecting the foreign object. The company provided a new microchip, but due to him doing that I have not had it done, that was when I was a kitten so about 6 years ago. Should mommy go ahead and have it implanted? Should she try another brand? Or should she just not have it done? Here are pictures from when it happened, and yes that is his microchip. http://cprcheetah.tripod.com/blog/index.blog/1749147/muncies-microchip-abscess/