As Bev says, tattooing is less prevalent than it was.

One 'gotcha' is the fact that not all electronic implants work with all the sensors available. Depends which country you're coming from.

We came from the UK, our 7 UK-chipped mutts all showed up on our vets scanners.

You talk about 'tags', I guess you mean electronic ones, but one thing which we'd never seen in the UK is the fluourescent (sp? sorry, it's late) collars witha bell. Very useful, especially in the hunting season, if Fido goes walkabout then its less likely that some French Fred with a rifle will mistake him for dinner......

Most hunting shops will supply them, there are the basic plain type and for a few cents more ones with q/r clips (the ubiquitous ones like on backpacks). The same shops will also supply stainless steel 'covers' with your phone number stamped firmly on them.

Hope this helps

Mick Dyer.