The Halo Collar was designed for the greatest comfort as a standalone safety solution for dogs. It has not been tested for comfort with other collars, so we don't recommend using it with another collar device at this time, as this may cause confusion for the dog. 

However, using a second collar isn't necessary - the Halo Collar can be used to provide your dog with remote guidance for additional training support. This occurs through the "instant feedback" feature, which lets you send prompts from your phone to your dog's Halo over Bluetooth, WiFi, or cellular. You can completely customize your dog's feedback from a range of sounds, vibrations, and optional static.

Soon, you'll also be able to record your own sounds to use as feedback!

While the Halo Collar is meant to be used without another training Collar system, we definitely recommend each dog in your household have their own Halo Collar. We also offer a multi-Collar discount when purchasing and we're here to help if you have any questions!