My mare lost almost half of the mane once (was all chewed off). Took forever (over a year) to grow it back. I was furious (because there WAS a reason why it was chewed off, some POS spat or threw something sweet (like a candy) on mane and left it there), BUT weird things happen. You can't do much except moving your horse in your own place.
"Life isn't about waiting for the storm to pass: it's about learning to dance in the rain..."
"When we are no longer able to change a situation - we are challenged to change ourselves."
"How people treat you is their karma; how you react is yours."