Snuggle Puppy is the all-natural solution for an anxious pet. Whether they're new to the family, or perhaps just going through a tough time, Snuggle Puppy is designed to provide comfort and relieve anxiety in your four-legged friend. Used this in the crate at night with an adopted puppy to help calm her. It actually worked! The "heart" has 2 settings and is meant to mimic a mother dog's heartbeat.