definatly do it! ive heard too many scare stories about collars being lost and if cody was to get "kidnaped" a microchip doesnt lie if you suspect someone. I took Isla when she was 5 months and vet said its injected in the scruff of the neck where they are picked up by so its less sensitive area then anywhere else. she didnt even flinch! its good that you can get it done when cody's under, one less little stress to worry about.