Only one of my four animals is NOT microchipped. Two came to me with their chip already and I got my first dog done after we brought home the second one.

I understand the risk, but I think the benefits out weigh the risks. One member here on Pet Talk has been on both ends of this. She had a cat that wasn't microchipped and got out of the house and was too late to save him. Then she had another cat that got the tumor from the injection site of the chip and lost her as well. Hopefully she'll see this thread and give her opinion.