I don’t think chickens raised for meat live anywhere near 2 years. Yeah, a quick google shows around a 2 month harvest time for chickens raised for meat. That’s a big part of why chickens are such amazing creatures and make such an affordable protein source, they can be sustainably* harvested year round. (Sustainably as in without decreasing the size of your flock.)
Laying hens are productive for two to three years. They rarely make it into the human food supply though, after that long the texture and flavor of the meat changes and American consumers don’t prefer it. You can probably get them through a local butcher shop, though they might have to order it for you.
In a small and well managed flock, chickens can live 6 to 8 years. In the wild, I don’t think modern chickens would exist at all. Ask anyone who’s kept chickens, keeping the hawks and foxes and raccoons etc. out of them is a constant and eternal struggle.
Surprisingly relevant lol