It’s not a good picture. Sheep, lost out in the wild, are goners. They aren’t very bright. They have no natural defenses. They can’t even run real fast. On their own they don’t do well at finding adequate food and water. Every time the word lost is used to describe a sheep, it’s a word in the original that carries a powerful sense - in fact it’s a word for absolute destruction, death, ruin. That’s what it means to be lost.