Adopted ! Ralph and sister Darla (Adopted) came to us from a shelter in Southern California.  They are reported to be greyhound/Great Pyrenees mixes and are about 1.5 to 2 years old.  We have sent a sample out for DNA testing.  update:  DNA testing does confirm that they are greyhound/ great Pyrenees.
Ralph is are very affectionate with people and enjoys the company of other dogs.  He is greyhound-sized with a furrier coat.  He walks well on leash and appears to have had some training.  He did well in cat testing.