When you set up your Whistle 3, you can only choose one pet to assign the tracker to. You will need to purchase an additional Whistle 3 tracker and subscription for each additional pet.

 

This video walkthrough shows you how to activate your first Whistle Tracker.

*Note: While it says Whistle GO, the steps listed are the same for Whistle 3:

 

Once you have activated your first tracker and are ready to set up additional devices, follow the steps below to start the activation process for your additional devices:

  1. Tap the Human Stuff icon in the bottom right-hand corner
  2. Scroll down and select Add A Whistle 
  3. Select the type of device you are activating
  4. Tap the green Set Up A New Pet button
  5. Select the Safe Place you are currently located at (note: if you just activated your first tracker, then you will only have 1 Safe Place to choose from)
  6. Tap the green Find My Whistle button, and follow the prompted steps to activate your additional tracker