What sound might indicate that an animal is feeling playful?

Barking can be a sound that indicates a playful demeanor in animals, particularly in dogs. When dogs are feeling happy and energetic, they often express this through playful barks, which can be short, quick, and high-pitched. This playful bark serves as an invitation for interaction, whether with humans or other dogs, signaling that they are ready for fun and not in any distress.

Other sounds, while they might occur in different contexts, do not convey the same playful connotation. Snarling typically indicates aggression or fear rather than playfulness. Whimpering often signifies distress, pain, or anxiety, while yelping can indicate discomfort or surprise, typically associated with a negative experience. Thus, barking is the sound that best represents a playful attitude in animals.