I did not know there was an HOA when I purchased the house, and I did not sign anything at closing stating such. I researched my county laws, and the hens were just fine to have, and even a horse was ok to have, because I own an acre. Once I closed on the house, I called the water district to setup the water service. At that time, the lady who I spoke with encouraged me to pay the $25 to join the Community "Water District" because I get a great deal on propane. She also notified me that water was scarce in the community, so there were restrictions on usage to regulate it. I paid the $25 without hesitation, as she acted like the welcoming committee, was very friendly, and seemed very happy to have me as a new neighbor. Still never signed anything. Now, all of the sudden, this same lady is calling me and mailing me letters regarding the chickens. And she pulled covenants to show me where I was in violation. I still haven't signed up to join any HOA. I did pay money, but technically, I've paid to a water district, and not a homeowners association, as it was never referred to as an HOA.
What I've been told by the neighbors (who like the rooster & hens), is that the HOA just likes to find people to pick on. Someone up the street from me used to raise iditarod (sp?) dogs. The barking drove neighbors nuts, and there were constant complaints to the HOA. But the HOA couldn't do anything about it, because they have no way of enforcing these laws. Besides, the HOA picks and chooses who the laws apply to. I know of 2 other neighbors who live in the neighborhood and raise all sorts of poultry & livestock (goats, rabbits, chickens, etc.).
If the $25 per person a year is dues to the HOA, I'm sure that money goes to road maintenance, and there is nothing left over for enforcement of these laws. Just aggravating to be the one picked on. I'd seriously consider selling the house and moving if I could afford it. I don't like to argue with people, but when you live more than a half mile away on the side of a mountain, why are you complaining about the rooster, when the people who are literally right next door enjoy hearing him? He is NOT that loud. No louder than the crows cawing, or elk bugling, or any other animals in our woods.