I must confess some of those 40 chickens are actually roosters.  We saw one of our neighbors recently and she said she had gotten a warning from the city telling her she had 10 days to get rid of her roosters.  She doesn't have any roosters.  She called to tell the city but didn't disclose the roosters' location.  I thanked her and am looking for new homes for our roosters.  It may be time for them to go to freezer camp.  Too many roosters is indeed a bad thing.