Bringing a puppy home is a big adjustment for both the human and the puppy. Especially in the first few weeks, the little dog experiences significant separation anxiety. The Beeztees Heartbeat Dog Toys make the transition easier for the puppy. These lovingly designed toys feature an opening to insert a heartbeat simulator (sold separately). This device produces an artificial heartbeat, simulating the familiar sounds of the mother's heartbeat or littermates. This has a calming effect on the puppy and helps them fall asleep. Additionally, the soft material allows the puppy to snuggle gently with the toy, providing a sense of security. The battery-operated sound chip emits a heartbeat for about 10 minutes after being turned on, before automatically shutting off. The battery is protected by a plastic strip that must be removed before use.