My girl was micochipped when she was spayed, and it was inserted right in the middle of her shoulder blades... it seems like it has moved just a little so about an inch or so above her right leg.... And like someone else posted YES i can feel it. it feels like a grain of rice, its' that small when you touch it you can move it a little not really move the actual chip more like move her skin so the chip moves. (It is very small it its' not that easy to find, i just happend to be rubbing her back and found it)
Anyway she didn't feel any pain and there have no complications or anything from it. IT was done in July.