If it is truly free to roam about the kampung, it probably does get into more freshly sprayed fields and whatnot. But if you've got it in a fenced area, you are just exposed to whatever travels on the wind. I'd argue the fans on a coup would suck a lot of that in anyway.
Also, it might be a bit marginal, but any feed that the chickens forage from your fenced land is a heck of a lot less likely to have been sprayed recently than the components of conventional feed. I haven't got any data for that, but I've repeatedly seen people spraying less than 48 before harvesting.
Probably seem like a pedant in search of an argument here, but I'm really a bit conflicted. I've known since I was in my late teens that sustainable farming is the way towards healthy people and environments (ignoring the population problem). I've just never been all that willing to put my money where my mouth is. I guess sometimes hypocrites shout the loudest.
Traditionally ayam kampung are allowed to go anywhere to feed themselves, minimizing (even eliminating) the owner’s feed cost. Chickens come home to roost, literally. Today I’m certain that a good percentage of them are raised in cages like ‘broiler’ chickens and fed the same industrial feed. Probably not battery cages, but definitely not free range.
Specific to Indonesia the problem is certification (or lack thereof). If people can literally buy a university diploma, buying an organic certificate is trivial. Even if the certificate was obtained honestly, people are not beyond switching their practices afterward.
If you’re gonna raise organic chickens, you probably can’t expect to get higher prices for them. It is fine for personal consumption, of course.
I’m not fully convinced that organic farming is inherently better. On one hand avoiding pesticides is definitely better (if you don’t care about yield), on the other hand the use of natural fertilizers increases the risk of salmonella. The one paper I can find from germany says 25% of organic fertilizers is tainted by salmonellae, and that’s over there in Europe. Several salmonella outbreaks in USA can be directly traced to organic manure.
While many people think that anything natural is automatically better, I don’t. Mother nature doesn’t give a damn, and in many cases she actively tries to kill us. Covid-19 is a painful reminder of it. We invent modern medicine and chemicals as defense against natural pathogens. The vilified nitrites/nitrates in food is there originally to inhibit Clostridium Botulinum, a particularly nasty germ.
I wish there’s a smart, non-ideological way of growing and processing healthy food that avoids excess chemicals while not leaving us at the mercy of nature.