Keeping chickens is a popular hobby in Eugene. There is in fact an entire store for urban chickens in the Whit. It is important to protect your chickens from predators and take good care of them. In Eugene you are allowed up to six chickens and six chicks at any time, but no roosters, geese, peacocks, or turkeys. You can slaughter the chickens for meat but not in the front yard and you can't be cruel to them. See this pdf on urban animal keeping.