I had Trevor microchipped when he was 3 mo. old, the same day he got his rabies shot. He did whimper when they injected the chip, but it was over faster than getting the rabies shot
It's a pretty big syringe, but scalpel like sharpness. There wasn't a drop of blood, so it pretty safe. After they inject it, they get their scanner and scan to make sure it works. They give you all the paper work to send in to the site that monitors the numbers.... But be prepared to wait. They have a backlog and I just had my check clear after 4 weeks. When I called the telephone number to check the status, it says they have a back log, and it could take up to 4 weeks to have the info entered. So I was extremely careful with Trevor because if he got lost and scanned, but wasn't in the computer yet, they might not have known to contact me.
Anyway, that was our experience. Simple and pretty painless. The vet fee was $45 and the fee to have it entered into the computer bank is $12.50.
Cyndie
Trevor's Mom