Why Do Horses Weave?

Q: I’m curious about my horse’s weaving. I know that excess calories/energy can play a factor, as can stress or some other trigger (though I haven’t really been able to spot a consistent “trigger” for my horse’s episodes—it can range from being handled in his stall to standing and the apparent anticipation of being tacked up), but what I’m most curious about is at how early of an age would a horse begin weaving, and why would he pick that over some other habit—is