How much selective breeding did it take to get chickens to lay eggs all year instead of just breeding season like most birds? Or did their ancestors came from the tropics so season doesn’t matter as much.
That’s exactly right. They descended from the jungles of Asia
Chickens are descendants of Jungle Fowl
https://search.brave.com/images?q=Jungle%20Fowl
https://en.wikipedia.org/wiki/Red_junglefowl
So they had warm weather all year round in most places.................
Our chickens didn’t lay nearly as many eggs in the colder months.