I’ve long used the lack of flying chickens to challenge the popular darwinian insanity.
Now and then chickens escape their farms into the whild. They’ve already been spotted almost all of the evolutionary stages necessary to become flying creatures. Why don’t they?
Because they can’t survive long enough.
Their bodies are too heavy for their little wings, and that’s not going to change as long as foraging is combined with feeding by humans.
I like them just they way they are...plump enough to eat. (Unlike doves...)