A Snuggle Puppy favorite, this lovable mutt will always be there to reassure and comfort your pet. Dogs and puppies are pack animals and are instinctively drawn to their mother and others in their pack. Snuggle Puppy recreates that intimacy with physical warmth and a simulated heartbeat. The result is a calmer, more peaceful pet - one that feels less loneliness, fear and separation anxiety. Snuggle Puppy uses a real-feel pulsing "heartbeat", the batteries (included) last up to 2 weeks with continuous 24/7 use and the hearts on/off switch allows for use when you need it. Two types of heat sources are includes: Disposable (Safe for people and pets, each pack lasts 24 hours), and Reusable / Renewable (Use over and over without additional cost, microwaveable heat source lasts 3-4 hours).