HEARTBEATS: Unique heartbeat rhythm designed to mimic the mother's heartbeat of each specific breed size to calm them like they are nuzzled up against their mother CALMING: Mother's heartbeat helps dogs transition to their new home and calms during separation; reducing anxiety and stress BREED SIZE: Simply choose the breed size calming pillow that is right for your pet, 3 dog breeds sizes available MACHINE WASHABLE: Calming pillow includes a machine washable heart shaped pillow and a removable calming heartbeat device TRAINING: Heartbeat calming dog toy helps reduce negative puppy behavior; less barking/whining during crate training BRAND YOU TRUST: Designed by K&H with OVER 20 years of experience in creating safe, innovative, quality products for pets