HikeArizona.COM

This is the Third Generation tracker, I upgraded to the 3+. It works perfectly, you will however need a strap, subscription and more importantly the charger/base station.
Link to their website: https://tryfi.com/

It can be picked up in Aztec, NM or I will ship it for ten dollars.

@Pivo
Agree FI 3+ works great. Much better than Apple AirTag I was using.

@Sun_Ray
A common misconception with airtags is that they "broadcast" a GPS signal of their location. In fact, all it does is connect to any nearby iphone via bluetooth and that phone provides the location to you (it doesn't matter who owns the phone it connects to, it all happens behind the scenes just like all phones help to indicate traffic speed on a map app). This works for dogs in the park in town as long as there are other people nearby with a phone. But it's basically useless in the woods or on a trail with no other people (with phones — and service).

That's where these dedicated GPS devices with their own built-in cellular connection are far superior (though they still require a lost dog to be somewhere that has a cellular signal).