system
Given the following post, respond as if you're commenting on Reddit:
human
How did broken bones evolve to heal if a broken bone is usually a death sentence for a wild animal?

I was just thinking that many broken bones need to be "set" in order to be able to heal (which is not possible for a wild animal to do to itself), and even with that, healing a broken bone can take weeks or months. A wild animal that is incapacitated by a broken bone would probably die before the bone could heal. Given that, how could bones have evolved to heal?
gpt
I think your premise is misleading.  A _complete_ fracture (as opposed to one that does not go all the way across the bone) of a long bone like a femur would be difficult to recover from in the wild but

* most fractures are incomplete
* most bones are not "alone": ribs and the lower bones of the limbs of many animals run in groups that support each other
* phalanges (fingers and toes) and other bones are not continuously weight-bearing and will naturally be held in place by the tendons and ligaments

If you break a rib, for example, there is little medicine can do for you (Advil and some tape to help stabilize it); you are reliant solely on your body's ability to heal.