“animal welfare has an evidence problem” by matthes

June 6
26 mins

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Episode Description

Why I stopped donating to animal welfare charities but feel more motivated than ever to redirect money and talent to the cause.

I have wanted to write this post for a while. It is an uncomfortable thing to bring up. Many people in the animal welfare space are working really hard, and this post might leave some feeling defeated. But I think this is one of the most important things to talk about in animal welfare right now. My intention is not to be a downer or create infighting. Instead, I hope this post inspires lots of people to tackle this major neglected problem.

key takeaways 

  • Even some of the most prominent animal welfare interventions have surprisingly weak evidence behind them. In some cases, the available evidence even suggests that the intervention may be causing harm.
  • Specifically
    • We have very limited data on electrical shrimp stunning that doesn't support a confident conclusion as to whether it's good or bad.
    • We have mixed evidence on whether transitioning egg producers to cage-free improves welfare overall.
    • We have evidence that the substitution effect of alternative proteins is weak, at best.
  • Significant additional funding and talent should be allocated to raise [...]

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Outline:

(00:44) key takeaways

(01:45) introduction

(02:29) three salient animal welfare interventions and their evidence bases

(03:17) shrimp stunning and slaughter

(11:01) cage-free

(20:29) alternative proteins

(21:47) this is a field-wide problem

(22:18) my recommendations to funders

(22:22) animal welfare should not be de-funded

(23:36) we should be taking ownership of the entire evidence pipeline

(24:49) when bet making doesn't make sense

(25:38) conclusion

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First published:
June 5th, 2026

Source:
https://forum.effectivealtruism.org/posts/svjqgyFuFQ34qSgmw/animal-welfare-has-an-evidence-problem

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Narrated by TYPE III AUDIO.

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Images from the article:

From the Research Results Report Appendix by CSES. A comparison of cumulative mortality.CC = conventional cages; EC = furnished/enriched cages; AV = cage-free aviariesTime series of cumulative layer mortality rate (standardised to 60 week mortality and double arcsine transformed).From the 2017 ITAVI report. The vertical axis is in percent.pondeuses sol = cage-free (indoor); pondeuses plein air = free-range; pondeuses label = free-range (premium label); pondeuses biologiques = organic; anciennes cages = conventional cages; cages aménagées = furnished cagesData from the supplementary material of the meta-analysis. Cumulative transformed 60w mortality in percent. CC = conventional cage; FC = furnished cage; AV = aviary (all types); ST = single tier aviary; MT = multi tier aviaryorange = evidence for higher mortality in cage-free systems; blue = evidence for higher mortality in caged systems; grey = no significant difference

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