Boil: Set carrots in a large wide pot. Pour in the broth. Add enough water to cover the carrots. Bring to a boil, cover, and let cook until carrots are tender, about 20 to 30 minutes.
Freeze: Place carrots on a parchment-lined plate in a single layer, then freeze until solid, about 2 hours.
Serve: Serve to your dog while supervised as an occasional treat. Store leftovers in an airtight container in the freezer.
Video
Notes
*Make sure the bone broth does not contain onions or garlic.