why is candy lonely

Candy is old with only one working hand. He has no family and works cleaning up. His only companion is his dog who seems just as old as him. Candy feels isolated and alone.

You seen what they done to my dog tonight? They says he wasn't no good to himself nor nobody else. When they can me here I wisht somebody'd shoot me..."

"I ought to of shot that dog myself, George. I shouldn't ought to of let no stranger shoot my dog."