CoSo PSA:

I honestly didn't know that I was supposed to follow a service dog in a vest if it approached me by itself.
I do now.
So do you.
The World is a slightly better place.
Well done us.

If a service dog without a person approaches you, it means the person is down and in need of help.

Don't get scared, don't get annoyed, follow the dog.

@Shenango_Linda thank you for sharing, I never knew that!