By now, you may have seen dogs who are wearing vests that indicate that they are some type of service or support dog at places like airports or hospitals, but what’s the difference, and is it Ok to approach those dogs?  There are three types of service/support related categories that we will discuss:  Service Dogs, Emotional Support Dog, and Therapy Dogs.  Regardless of the type of service or support animal, you should always first ask the owner if you can approach the dog.  If it is a service dog, owners will often decline because their dogs are working and not in play mode.