I can't remember exactly where you are, the Far East as I remember. I have no idea what "broilers" might be available to you. To me there are three kinds of "broilers" or meat birds. All three kinds are developed by selective breeding, no GMO or gene manipulations involved other than choosing which birds get to breed. Each one fills a specific niche.I'm thinking about raising a few next year but wondering if free ranging will work instead of coop them up n feed them the broiler feed.
One is the Cornish X, CX, Cornish Cross, whatever you want to call them. Those are the standard meat birds you find in the grocery store, bred to be eating and pooping machines and butchered at 6 to 8 weeks. Some people can and do keep them alive longer using various techniques but they are designed to not exercise. just eat, drink, and put on weight as quickly and efficiently as possible and be butchered at a specific age.
The "Rangers" were initially developed to be a pasture-fed version of the CX. They grow a little slower and do well behaviorally on pasture. They still eat a lot so they still poop a lot but not quite as much as the CX. And if they forage on pasture the poop is more spread out during the day. You still have to manage the poop more than with the Dual Purpose but not as much as with the CX. The original Rangers were called Freedom Rangers and I believe developed in France. In the last few years various other "Rangers" have been offered and some others of this type often called some version of colored broilers are also out there. I have no idea how hatcheries work where you are or how they might be offered to you but you would be looking for meat birds to be butchered around 12 weeks of age.
The other type is dual purpose. I don't think I need to go there.
Good luck!