WWYD?- Neighbors behind you got chickens...

Well, in the olden days, you would be able to just go talk to them and let them know it is not allowed and that the noise that you are hearing is disruptive. This would give them the opportunity to rectify the situation like good neighbors. If they didn't at that point, you would turn them in.
Nowadays, people are crazy, so if I didn't know them, I would report them to the HOA.

HOA, zoning, whatever is necessary to remedy this. We have zoning restrictions for a reason.

If I hear it then I would report it. If I didn't and would otherwise not know they were there, I probably wouldn't. I do not want to listen to noise that is allowed, much less noise that isn't.

Absolutely, without a second thought I would turn them in/complain/file a formal complaint/whatever I needed to do to get rid of them.

My city doesn’t allow chickens, thank god.

If it is not allowed, I would tell the HOA. But, it would depend on how noisy they were. Some of the dogs around me bark quite a bit. Chickens might be a nice relief. Lol! My city allows hens but not roosters. I haven’t checked to see what my HOA allows.

I’d let it be because they’ll get turned in by someone in a matter of time anyways..I just wouldn’t get involved. 

How many chickens are we talking about? My old neighbors had two. We shared a back fence. I heard the hens but never smelled anything.

BUT, given that it is against the HOA rules, I would probably turn them in. Give an inch and they take a mile kind of thing. And all bets are off if there is a rooster.

Well since you have an HOA and the chickens are noisy, I'd do something.  Not sure if I would go to the neighbor's first or directly to the HOA.  I guess it would depend on if you have a relationship with the neighbors and what it's like.

In our previous house our neighbors got chickens.  But we didn't have an HOA, we had a large lot and so did they and the chickens were quite a ways back. I was a little nervous at first but as that neighbor was persnickety and super anal about his yard, we figured he would keep the coop neat and clean and he did.  Occasionally he would let the chickens out and they would wander slightly into our yard but not far and not for long so it was never an issue. If it had been we would have reported it to the city.  When he first got them they weren't allowed.  Then they were but only I think 3-4 and he had more like six.

Chickens stink never mind the noise. I would complain in a heartbeat.

We have two acre zoning around here, and many people own chickens, including our next door neighbor. I believe there are guidelines as to how many you can own based on the size of your lot.

They had a rooster at one point (which they got rid of because he was an asshole), and his crowing was annoying, but otherwise the remaining chickens aren't a nuisance in any way--sounds, odors etc. I actually like them because in the warm months they let them out of their coop and they wander over to my yard and eat ticks and other bugs. I like watching them.

I would turn them in. They moved into a neighborhood with HOA rules so they should follow them.

Go tell them you’ll trade your silence for eggs .

My mom had chickens in our suburban neighborhood when I was growing up. That’s how she kept the neighbors quiet .

But really, I would also notify the HOA. Chickens are messy and smelly and only belong on properties zoned for them, with adequate space and shelter.

I have have kept  chickens for years. They only smell if you don't clean them out regularly. I would report anyone who wasn't giving their chickens adequate care.

They are a lot less noisy than barking dogs, screaming children and lawn mowers. 

My next door neighbours have chickens. I hardly ever hear them. And they don't smell either (the coop is 15 feet from our joint fence).

But if you have an HOA that prohibits it, then I'd call them.