[Nightlight]

I have just noticed that the last couple of days when I pet Zelda I can feel something under her skin around the back of her neck. It is not a bump or a skin irritation. It is rather small thing (smaller than a grain of rice) under her skin and it moves around when I pet her! It is beginning to freak me out. My boyfriend also felt it when he was petting her this morning. She is microchipped and I am feeling this on the back of her neck. I thought it had to be the micro chip but when I asked my friend she told me I couldn't feel microchips and that it has to be something else but she does have larger dogs. Zelda is tiny so is it possible to actually feel the microchip?