The term 'Little Dog's Bark' is a phrase used to describe the sound of a small dog's bark. It consists of three words: YAP, ARF, and YIP. YAP is a high-pitched, short bark that is often associated with small dogs such as Chihuahuas or Pomeranians. ARF is a medium-pitched bark that is usually heard from larger breeds such as German Shepherds or Labrador Retrievers. Lastly, YIP is a sharp, high-pitched bark that is often heard from toy breeds such as Yorkies or Poodles. All three words together form the phrase 'Little Dog's Bark', which is used to describe the sound of a small dog's bark.