Commercial poultry farms have equipment to take off the feathers, but you will have to do it buy hand. Finally, you need to market your chickens. Supermarkets have contracts with major suppliers, so you cannot sell them there. You can try selling them at a flea market, but you would need a booth.
Antidiuretic hormone (ADH): A relatively small (peptide) molecule that is released by the pituitary gland at the base of the brain after being made nearby (in the hypothalamus). ADH has an antidiuretic action that prevents the production of dilute urine (and so is antidiuretic).
1 If the body is becoming fluid-deficient, this will be sensed by osmoreceptors, which results in increased secretion of ADH, causing fluid to be retained by the kidneys and urine output to be reduced.  The hormones ADH (Anti-diuretic Hormone, also known as vasopressin) and aldosterone play a major role in this.