this post was submitted on 19 Jun 2025
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[–] gandalf_der_12te@discuss.tchncs.de 70 points 5 days ago* (last edited 5 days ago) (5 children)

I remember there was a study done on how to best slaughter swine (pigs).

The methods that were investigated included: a mechanical hit on the head, suffocation in CO2, and some other measures.

What was found was not only that the suffocation method caused significant stress in the animals, but also that the meat collected this way tasted way worse than meat collected through other slaughtering methods.


this could be relevant in this case: if fish suffocate slowly to death, meat producers might have a financial incentive to change that, to be able to sell better-quality meat, possibly at a higher price. anyways, it would make for good advertisement. that is why meat-producers (fish-producers) should take this seriously.

[–] Crankenstein@lemmy.world 44 points 5 days ago (3 children)

And the reason we still use CO2 slaughter instead of something like Nitrogen is because.... They already have machines built for CO2 and just don't want to pay the cost of changing practices.

Pure greed and laziness.

[–] AnUnusualRelic@lemmy.world 15 points 5 days ago (2 children)

Also co2 is easier because you can fill a pit with it, nitrogen will just float about and disperse.

[–] joelfromaus@aussie.zone 3 points 4 days ago

As far as I’m aware NO~2~ will fill a pit. In the industry I work in NO~2~ leaks are serious threat because the engines that are worked on are in, what is essentially, a cage that you walk down into. I’ve not experienced it myself but heard from someone who experienced it firsthand as you just start feeling sleepy. I know now that it’s because our bodies are sensitive to asphyxiation from CO~2~ but not NO~2~, so as it displaces the oxygen in our lungs you just start getting woozy and tired.

All that being said; I am not an expert. Half this is information from diesel mechanics who work with it and the other half is from random science videos. So take it with a grain of salt.

[–] lars@lemmy.sdf.org 2 points 5 days ago (1 children)
[–] AnUnusualRelic@lemmy.world 4 points 4 days ago

It tends to be heavier than air, it will therefore accumulate in low places.

[–] ubergeek@lemmy.today 7 points 4 days ago (1 children)

Most slaughter houses use bolt guns.

Zero pain, or as minimal amount of pain as possible. Like, microseconds. Because afterwards, the entire brain has been... disorganized.

[–] 9blb@feddit.org 4 points 4 days ago

Most slaughter houses use bolt guns.

It's hard to find official statistics, but most definitely not.

It is clear, however, that in the United States today, “CO2 stunning of pigs is the major method that is used in large slaughter plants.” According to unpublished data from the Pig Improvement Company, the use of CO2 gas to stun pigs has increased dramatically in recent decades. In 1999, CO2 was used to stun 2 percent of all pigs and 2.2 percent of pigs in establishments that slaughtered more than 4,500 pigs per day. By 2020, those numbers had risen to 86.2 percent and 96.2 percent, respectively. Today, according to FSIS enforcement records, at least 32 slaughter plants use CO2 gas slaughter systems.

https://www.fsis.usda.gov/sites/default/files/media_file/documents/23-05-AWI-05162023.pdf

Zero pain, or as minimal amount of pain as possible. Like, microseconds.

If you assume, that the operator doesn't make any mistakes and is always 100% on point. Which they are not, as has been documented by countless of hidden cameras people have put up in slaughterhouses.

And even then, you are ignoring the immense pain and stress the animals experience the rest of their life before getting killed.

[–] DarthFrodo@lemmy.world 6 points 5 days ago* (last edited 5 days ago)

They just know people will buy the meat no matter how much the animals were abused so why would they bother? Even those who see themselves as animal lovers happily look the other way with every purchase. The industry has all the incentives to be exceptionally cruel so of course it is.

[–] BoxOfFeet@lemmy.world 17 points 4 days ago

My slaughterhouse uses radon. The meat makes my testicle feel funny, and we throw up a lot. And I haven't had hair in years. But it's cheap! And so tender.

[–] phoenixz@lemmy.ca 13 points 4 days ago (1 children)

I never understood the CO2 suffocation idea.. I mean, I don't k ow about fish, but mammals supposedly have a good detection for CO2 in their blood and it'll set off panic alarms everywhere.

Ignoring the vegetarian discussion for a minute, if they could at least use a different gas, say nitrogen or something, it should be a lot less stressful for the animals

[–] CalipherJones@lemmy.world 8 points 4 days ago (1 children)

"Are you insane? This gas costs a twelfth of a cent more! There's no way we could implement this."

[–] phoenixz@lemmy.ca 1 points 3 days ago

Oh, yeah, there's the answer

[–] aeternum@lemmy.blahaj.zone 10 points 5 days ago (2 children)

I have a crazy idea here. Now hear me out, this is gonna sound like a wackadoodle idea, but,...... how about we don't murder the animals? Crazy, I know.

[–] trouble@lemm.ee 17 points 5 days ago (42 children)
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[–] nednobbins@lemm.ee 11 points 4 days ago

Yes. It's crazy. That's why the vast majority of us don't do it.
It's one thing to be a vegetarian for health or environmental reasons.
When you try to convince people that meat==murder, you come across as a wackadoodle.

[–] zipzoopaboop@lemmynsfw.com 6 points 5 days ago

Stress is a hell of a drug