Find an example (quote) of Death as natural; survival of the fittest. (Ch.1)

Candy's old dog is considered useless. Carlson challenges Candy to shoot it because it smells and is of no uses to anybody. Candy feebly attempts to defend his dog before he must surrender the dog to Carlson.

The old man [Candy] squirmed uncomfortably. "Well-hell! I had him so long. Had him since he was a pup. I herded sheep with him." He said proudly, "You wouldn't think it to look at him now, but he was the best damn sheep dog I ever seen." ch 3