My vet charged us about $30 for her to be tattooed, but I'm pretty sure the dog has to be under anesthetic to have it done or given a tranquilizer of sme sort (incase they wiggle around, because it won't turn out right unless they're perfectly still) and since she was being spayed at the same time it was easy. It would probably cost both of you more I'd think, but I'm not sure. You'd have to ask your vet, or call around.