Originally Posted by Scoutrider
Weird things can happen with animals. I can't speak from experience for larger herd horse breeding operations, but I know that beef cattle farmers typically expect an average 10% loss of calves per year, for one reason or another..
The places I have worked would have made me roll up my bedroll if I had a death loss of 10%. About 3% is all most ranchers can tolerate but maybe cattle farmers are different.
To the OP: I think this is a good indication that everything you read on facebook isn't to be believed. I'd say it's pretty unlikely that an owner would lose 4 foals in the exact same way, particularly one like getting kicked in the head.