I got curious after reading the original post and did some web surfing. I've been having a conversation with Stephen Greenberg at
Pet Tags: Dog tags, Dog Collars, Pet Id Tags, Cat Tags, Dog Name Tags & Pet Collars from America's Favorite Pet Tag . They are developing a product that they hope to bring to the market in a few months called Pet Detective - which looks like a device that's attached to the dog's collar. They have a short video about it at
Untitled Document . I can't see it clearly on my screen, but it looks like it may be a little bulky for a small dog's collar, but might work well attached to a harness. I got on their mailing list for more info as it's available and will share it here.
In the meantime, Stephen set up a coupon code for a 20% discount for YT members on their pettags.com site. You just enter YT36Z to the coupon field at the top of the checkout page. They currently have a 16% coupon code displayed on their site, so this is a little better savings. I haven't done any business with them, so I can't say how reliable they are -- but they do have some nice looking tags and I think I may order one for Tallulah -- I'm trying to make sure there is some ID attached to her breakaway collar and each of her several harnesses just in case. This last part about the coupon code probably belongs in the products forum so I will post it there as well.