Their slaughtered brethren.

Poor guy never figured out how to make shears in Minecraft 😔😔😔
- F in the chat please, boys
- Took me a while to figure that out too ¯(ツ)/¯

My ex thought the only way to get llama wool was to kill the llama. For some reason, this logic only applied to llamas, she understood sheep wool didn't require the same sort of blood sacrifice.
- Required processing through a Cessna propeller blade
- that's actually not true. All wool sheep go to slaughter. When they're no longer useful, they end up dead and on someone's plate.
  
  I mean they are certainly shorn more than once before that happens, so I wouldn't exactly say it's a blood sacrifice.

One of the cutest things I've ever seen was at a county fair. A woman was combing this enormously fluffy angora rabbit, and spinning the fluff directly into yarn. I have never seen another bunny reach such cat-worthy levels of smug satisfaction in my life.
- They used to do that at our county fair too! Only it was three old ladies who looked very much like they might have just been visiting our realm from a story book about witches. One was combing the rabbit, the next was carding the fluff and the third was spinning on, I'm pretty sure, Sleeping Beauty's actual spinning wheel. There were a bunch of rabbits just lazing about at their feet, waiting for their turn. It was my favorite part of the fair.

Animals bred for wool typically end up getting slaughtered for meat as soon as they stop being profitable, so they're actually not wrong.
- How do you know the wool came from animals that are now too old to produce?
- Plus depending on your location, they are barely profitable for wool, so it doesn't take much for one sheep to cost too much.

Yeah, uh, in mass production they're treated like garbage, cut up during shearing, abused, crammed into tiny shitty conditions. They're not inherently killed to produce wool but they do often die in relation to being treated as raw material for production.
- And when they stop being profitable (by not producing top-quality wool as they age), they do get slaughtered for meat.