What is a classic symptom of kennel cough in dogs?

Persistent coughing is indeed a classic symptom of kennel cough in dogs, which is also known as infectious tracheobronchitis. This highly contagious respiratory disease is primarily caused by the bacterium Bordetella bronchiseptica, along with various viruses that can infect the upper respiratory tract of dogs. The coughing associated with kennel cough often has a distinctive "honking" sound and may be triggered by excitement, exercise, or other environmental factors, making it a hallmark sign of the condition.

While loss of appetite, excessive itching, and watery eyes can indicate other health issues in dogs, they are not characteristic symptoms of kennel cough. Loss of appetite could occur due to a variety of reasons, including stomach upset or other illness, but it is not a defining feature of this particular respiratory condition. Similarly, excessive itching is generally associated with allergies or skin issues, and watery eyes are often indicative of ocular problems or allergens rather than kennel cough. Thus, persistent coughing stands out as the primary symptom directly associated with kennel cough in dogs.