We have the Tagg GPS tracker for our SPOO that we use when we are at our property in the country. The first one we had was defective but the replacement is working great. You use your computer to set up a home zone and you receive notifications on your cell phone when the dog is outside of the zone. We had to use it one morning when my husband was outside with him and Fred wandered off out of sight. I opened up the app and hit the locate button and it found the big stinker exploring a new area on the property. We walked in that direction calling his name and could see him running towards us from the woods. Not sure the system would be good for traveling because the home zone is quite a bit larger than the normal campsite and it would have to be set up at each stop.
