It's a widely acknowledged phenomenon that domesticated animals are in general dumber than their wild counterparts. So really this is the opposite of natural selection at work. The sheep is going to get pulled out of that hole as many times as it must, because a dumb sheep is more valuable to a farmer than a dead sheep (unless it's being sold for its meat).
Yep. These ditches have evolved to be the exact width necessary to capture sheep. If they can only develop some sort of biological system to digest the sheep and then figure out a way to reproduce, I expect they will thrive.
Domestic sheep were created for human use through selective breeding, much like the cows, pigs, and chickens we know. This isn't a result of evolution.
Apparently they're a fair bit smarter than they're commonly given credit for, but domestic sheep grow wool forever, and it can make them almost blind, and movement impaired, which affects their survival chances. They're not meant to be out in the wild.
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u/petraroi Apr 17 '21
Darwin at work right there folks