stand on wire-mesh flooring so unlike the earth that their nails, which would normally wear down while scratching the ground, curl around the bars. Feather loss is common as hens rub against cages until many appear to have been plucked, their bodies raw with sores. They cannot roost at night, dust-bathe to clean themselves, feel sunlight, breathe fresh air, build a nest, raise their young, or even freely stretch their wings ... (Singer, 176)1