This sign is on many telephone poles in the city. Do you know the owner of the dog?
I don't know the owner, but Google does if the phone # is the owner:
http://www.google.com/search?q=330-793-9595 (http://www.google.com/search?q=330-793-9595)
I believe the phone number is for the person who found the dog.
doh! I looked at that and it slipped right off my mind.