Even their beaks have nerve tissue and pain receptors. Chickens have excellent vision. They see a color range similar to that of humans and a field of 300 degrees. Adult chickens can recognize and remember about 100 other chickens depending primarily on features of the head and neck. At night, chickens like to roost in trees.
Chickens keep very clean by taking baths in the dust.
The sand and other fine materials move through their feathers removing oil build-up and keeping them clean and fluffy. Nesting is extremely important to laying hens. They prefer to lay their eggs in a private nest, and have an elaborate sequence of behaviors they perform while searching for a nest site, building the nest, and laying eggs. The Humane Society of the United States. All rights reserved.