It will depend on the municipality ultimately.. somethings don't allow for grandfather causes.. like breed specific legislation that disallows say pit bull from living in Denver.. They don't care how long you've had them or what you do.. even our military has written breed specific l;language and made families of servicemen and women re-home their beloved pets.He should be covered under a grandfather clause.
You hit the nail on the head right here.. frankly I'm not sure I buy a rooster living for 15 years.. and I want some... details on how he was allegedly kept.. but that would be AMAZING!Frankly, if the rooster is 15 years old, it's a practical reality that it won't be a problem for long. People should leave this old man and his older friend in peace.