I have a "Caution: Dogs on Premises" sign as around here, I heard that you're supposed to have something as a warning that you have dogs. We just have it to warn people that there are dogs in the house, or in the yard. I don't like the ones that say "Beware of Dog" as it makes them sound vicious and more often than not, the company who makes them put a horrible picture of a Doberman or German Shepherd on them.