Let me ask you a question - how old were you when you learned if a dog in a service vest approaches you alone, to follow the dog because something happened to his owner? I was today years old.
Thankfully I have never been in this situation, but it got me thinking. I cannot say for sure that if a service dog approached me without his owner, that I would think to follow him. These dogs go through extensive training to be able to help their owner in the event of an emergency. As a society, it may also be helpful if we knew how to recognize the signs.
If you are thinking, "follow the dog acting strange and barking, that's easy enough," that's not all it is, it is quite the opposite actually. Service dogs are trained not to jump and bark. Instead, they will nudge your hand or leg. Do not take this as poor manners or bad behavior!
It is recommended that if a dog in a service vest approaches you without an owner and starts nudging you, ask where? or what? Most service dogs are trained to guide strangers in the direction of their downed owner. Just follow the signs and trust the dog!
Now you know. So let me ask you again, how old were you when you learned if a service dog approaches you alone, to follow the dog?