The term 'Small Bark' can be broken down into three separate words: YAP (3 letters), YELP (4 letters), and YIP (3 letters). YAP is a high-pitched bark or YELP, usually made by small dogs. YELP is a loud, sharp bark, often used to express excitement or alarm. YIP is a short, sharp bark, usually made by a puppy or young dog. All three of these words are used to describe the sound that a small dog makes when it barks.