He looks like he may be an austrailian shepard (he has no tail) or border collie (mix?). Either way he'll have lots of energy and be a great hiking partner. He's currently about 40 pounds, and may get a little bigger.
He was found in the middle of Sossaman Road, near Chandler Heights Road, on Monday night. He's a nice dog and wants to lay in your lap and likes lots of attention. So far, he has no bad habits and has ignored the cats. He is young, probably 1-2 years old, but seems to be out of the destructive stage. He was timid around other dogs at first, but he's coming around.
In the pictures, he looks like he has two different color eyes. Really he is blind in one eye. It appears to be an old injury but the eye doesn't seem to bother him at all.
PM me if you're interested in this hiking partner.