Beware of Dog signs from eSigns are perfect for letting people know that there is a dog on your property. In addition, some municipalities have ordinances requiring notification if you own a temperamental dog. Don't take chances - prominently post these signs to prevent needless injuries, and protect yourself from potential fines. In the event someone does stray where they should not have been, these signs can help prevent potential lawsuits, because you had warnings clearly posted.
Another useful tip about Beware of Dog signs: they can serve to deter some would-be burglars and intruders - even if you don't actually own a dog. A potential burglar who doesn't know for sure that you don't have a dog is likely to go on his way in search of an easier target.