Finger Lickin' Goodness

I heard this urban legend when i was really little at my friends house. It was kind of mentioned in the expanding horizons section on urban legends. So there is a babysitter watching a kid and their dog. she keeps getting all these weird sounding phone calls and starts to freak out. She goes to the bed that the dog always chills under. The dog is apparently some good watch dog that licks your hand if everything is alright. She feels the lick and calms down. Then she goes into the kitchen or something and sees the dead dog with a note around its collar saying "people can lick hands to"