In the scene where it's discovered Edwina hasn't laid any eggs, Ginger whispers to Bunty, "Why didn't you give her some of yours?" Bunty replies, "I would have, but she didn't tell me. She didn't tell anybody." Since going a week without laying eggs lands a chicken on the chopping block at the Tweedy's farm, which has already been established as a pretty rotten place to be, Edwina effectively committed suicide.
Either that, or she became essentially a martyr. Seeing an usually productive hen such as Bunty lay less eggs than usual could have been taken as a sign that she wouldn't have been worth keeping within some weeks. And that could be said of any other chicken. Edwina simply preferred to accept her fate rather than risk having someone else be unjustly killed because of her.
Later, we get treated to a scene inside of the Tweedys' house. There, we get to see a roasted chicken which has been picked clean. Make of that what you will...
The main page doesn't omit the fact that Tweedy's Farm is a Crapsack World. Real chickens in factory farming have it much, much worse. At least these chickens can go outside.
What might have happened if the plane never got the Christmas lights hooked on, and Rocky and Ginger had nothing to pull themselves back onto the plane?
Wait a sec, wouldn't that door kill Mrs. Tweedy?!
Probably not, since she managed to survive the machine explosion.
What would have happened to Babs if the Tweedys hadn't switched to pie production over egg farming?
Naturally, an egg will only hatch a chick if the mother hen bred with a rooster. Which means that all the chicks we see at the end would be either all Ginger and Rocky's offspring, or the guy ... ensured everyone's eggs would give them one. Although it probably plays by the fictional rule that an egg always hatches if it doesn't end up as food.
Well, Fowler might also have *ahem* contributed, though there's no indication that he's considered a Silver Fox by any of the hens.
Fowler had quite a few other chickens dancing with him in the earlier scene.