What does a dog wearing a yellow or burgundy coat warn of?

Answer: A — deaf pedestrian

This is because dogs that wear yellow or burgundy coats generally indicate that the dog is a service dog or emotional support animal that is assisting a deaf individual. While it is important to always be cautious around unfamiliar dogs, the yellow or burgundy coat on a dog should not be seen as a warning of aggression or that the dog is in training or a rescue dog.