Thanks for the warning. I have been worrying about the same thing. I don't see how implanting a foreign body into the dogs could be good in the long run. We had our Jack Russell microchipped a few years ago, and he never stopped worrying with that spot on his back, trying to reach it, or rub it on the rugs. I know so many have the chip, and have no complications; but I have some concerns. I would just die if Sawyer ran off and got lost; but the idea that something I did to him caused him to be ill scares me more. For all of you that have the chip; please don't think I am bashing you. I had the chip for my other dog too, and thought it was a great idea; now I am concerned. New information always seem to change things doesn't it?