Phoenix, Penny, Orion & Highway are all chipped as are all 3 of my roommates cats. Phoenix is done thru AVID and everyone else is thru 24HourPetWatch. After having my last three APBT's stolen from me, I told myself when I got more animals they would all be chipped and I am ok with tatttoing also as sometimes the chips move or scanners can not read, I will check into with my vet though, I know he does it. My little show girl is the only one who is not done and she will be asap