Sorry for your loss. :hugs I don't think it was shrink-wrapped. In one of the pictures you posted, it looked like its bill/beak was over its wing, not under. That's a common malposition that can keep them from being able to pip.
For the last several years, we've lost one or two here and there, but in the last few weeks, we started losing at least one a day, and the day before yesterday, at least four were killed and at least two were injured. I say "at least" because those were the ones I found and it's possible some...
I had to look it up, lol:
https://www.countryandstable.com/blog/how-much-weight-can-your-horse-carry-horse-rider-weight-calculator/
"As a general rule a horse on average is able to carry a rider which is the same as or approximately 20% of the horse's weight."
I think I was about 140 and the...