Candy looked a long time at Slim to try to find some reversal. And Slim gave him none. At last Candy said softly and hopelessly, “Awright – take ‘im.” He did not look down at the dog at all. He lay back on his bunk and crossed his arms behind his head and stared at the ceiling.
– John Steinbeck
Of Mice and Men, Chapter 3. Candy finally gives in and allows Carlson to take his dog and put him out of his misery. He doesn’t look at the dog, his friend that he loves, because he feels bad about having it put down.