That's why he never brought the kills home. He didn't want anyone to know just how much there was. He was afraid that as the reserves grew and the specter of starvation retreated, they'd be tempted to get rid of him. As long as he was needed, he had a home. Once he outlived his usefulness, they might turn on him and force him out. He didn't trust them, but then why would he? The only thing he saw reflected in their eyes was fear and loathing.
