Sorry...I wanted to add that before I had Madison vetted and neutered and chipped, I DID do extensive searches by phone to vets, shelters and online searches at Petfinder sites to try to find his owner, but came up with nothing

. The shelters and vets told me that he probably had been part of a puppy mill operation somewhere in the desert and b/c of having a "roachback" probably wasn't sellable, so they just dumped him out in the desert

(there's a big population of "dumped dogs" out there

).