To Broadcast Dog Data on your Garmin Astro 430 please follow these steps
  1. Go to main menu
  2. Select "Setup"
  3. Select "Dogs"
  4. Select "Broadcast Dog Data"
  5. At this point you will be able to turn this feature on or off.
Note: Turning this feature on will allow you to connect your device to other Garmin devices. Example: Drive Track 70, Fenix 3, Fenix 5 watches