I wouldn't advocate breaking the law, or ordinances, or anything like that, but I do often. Not with my poultry or anything, I have 20 acres in the country with no ordinances. Let me explain, I'm a mason and around half of the work I do is in a small town nearby. They have a rule that you can't do construction work before 8:00 am, and I get it, and respect it most of the time. However, it's in the 90s and 100s here in late June through August most of the time. Not only is laying block in 100 degree temperatures hard on block layers, but it's even harder to keep your mud nice. We try to go at 5:30 or 6:00 so we can get out of there by 1:00 or 2:00 - Noon if it's too hot. By far most people get it. I make sure all the sawing that we need early is done in the afternoon the day before, put stuff where I don't need my forklift till 8:00, and mix the first few batches with a shovel - we are quiet in the early morning. Town cops even drive by and wave (it's a small town, I know most of them). But every great once in a while, somebody will complain, one of those cops will come to me and apologize for having to tell me what we both know. No tickets or nothing, we just have to finish that one with 8:00 am starts. A week later, the same cop will wave and smile at me at 6:00 am on another street working.
9 acres is a lot of ground for 9 chickens. Were it me, I may look into how bad of crime is it. Do they just tell you "no"?, or is it $100, or $1000? More than likely, the worst that would happen is they tell you some need to go. Do they have an official chicken counter inspecting properties? Then I'd push my luck a little, while working on getting the rules changed. Nothing crazy, but maybe try 15, or a small quail run tucked in somewhere. If you get along with your neighbors, are respectful, clean, and don't get carried away with a big chicken ranch, I'd almost bet nobody complained. I've come to the conclusion, in my experiences at least, that most ordinances aren't really enforced much unless there is a complainer nearby, or somebody goes too far overboard breaking them and becomes a problem neighbor.