This error has everything: drama, pathos, the word flashing, sheep/goats, unintentional castration

I couldn't put it with four other homophone substitutions. It needed its own post.

Nightmares are old friends, flashing terror that’s been all too real in his past, in gorey, traumatic scenes that leave him feeling as wethered as an old soldier.

wether /wĕᴛʜ′ər/
noun

A castrated male sheep or goat.