What reason does muley give for sharing his rabbits?

Muley says it is the right thing to feed others when they are hungry,

"Muley fidgeted in embarrassment. "I ain't got no choice in the matter." He stopped on the ungracious sound of his words. "That ain't like I mean it. That ain't. I mean"— he stumbled—"what I mean, if a fella's got somepin to eat an' another fella's hungry— why, the first fella ain't got no choice. I mean, s'pose I pick up my rabbits an' go off somewheres an' eat 'em. See?"