Some things to try are
Find one of the local hunters and have him ask around if any one is missing a dog.
Take it to the local vet ,he/she may reconise it or know who would know
Place a add in the paper
Call the dog pound and see if anyone has ask about a dog.
Flyers with pic, if possible in local post office ,stores,pet food store ect
Hope you find the owner, I know I would be heartbroken if my Simmon would come up missing.