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Investigations

What the Industry Doesn't Want You to See

Long-form summaries of the most consequential undercover footage and regulatory findings inside industrial animal agriculture — sourced from Mercy For Animals, L214, Animal Equality, Open Cages, Direct Action Everywhere and government inspectors.

Why this matters

Footage that changed laws, and the systems that resist it

Every major welfare reform in the last fifty years — gestation crate bans, battery cage bans, fur-farming prohibitions, the UK's legal recognition of octopus and crab sentience, the end of chick maceration in France and Germany — has been driven by investigative footage that the industry spent decades insisting did not exist or was not representative.

The six investigations below are our editorial summaries of the most important reporting, with primary sources linked. They are not the worst of what has been documented. They are simply the most representative.

The reporting

Six investigations

Rows of breeding sows lying in narrow metal gestation stalls inside a dim pig barn

Pigs · Virginia, United States · 2010

Inside Smithfield: Gestation Crates at the World's Largest Pork Producer

In 2007 Smithfield Foods promised to phase out gestation crates within ten years. Three years later, an undercover investigation at one of its Virginia breeding farms documented more than 1,000 sows still confined in them.

Read the full investigation
Thousands of white meat chickens standing close together on litter inside a long broiler shed

Chickens · European Union & United Kingdom · 2023

Up to 42 kg per Square Metre: Inside Modern Broiler Sheds

EU law allows meat chickens to be stocked at up to 42 kilograms of bird per square metre. Europe's food-safety scientists recommend roughly a quarter of that.

Read the full investigation
Fluffy yellow day-old chicks crowded together in a grey plastic hatchery tray

Eggs · Global · 2022

Six Billion a Year: The Killing of Day-Old Male Chicks

Egg-laying breeds are bred for eggs, so their brothers have no commercial use. Most are killed on the day they hatch — though several European countries now require hatcheries to stop.

Read the full investigation
Circular open-net salmon pens floating in a sea loch beneath misty hills

Fish · Norway & Scotland · 2024

Open-Net Salmon: Sea Lice, Disease and Mass Mortality

In 2023 almost 63 million farmed salmon died in Norway's sea pens before harvest — about one in six. Injuries from delousing, gill disease and winter ulcers were among the leading health problems.

Read the full investigation

Updated

How to read an investigation critically

Almost everything the public knows about the inside of a modern farm or slaughterhouse arrived through an investigation. Facilities are private property, inspection reports are rarely published in full, and the industry's own imagery shows barns that hold a fraction of the animals a commercial shed actually contains. When footage does surface, it is usually filmed by an undercover worker who took a job for months, or by a government veterinarian whose report was obtained through a freedom-of-information request.

That pattern matters for how you should read the summaries collected here. These are not random incidents chosen for shock value. Each one was picked because it was corroborated — by a second investigation at a different site, by a regulator's own findings, by a prosecution, or by an industry body conceding the practice is standard. Where a company disputed the footage, we say so and link to their response. Where a practice is legal, we say that too, because the legality of an image is often the most important fact about it.

The uncomfortable conclusion running through all of them is that cruelty at scale is rarely the work of an outlier. Line speeds, stocking densities, genetic selection for growth rate and the economics of a fraction-of-a-cent margin per animal produce the same outcomes across countries with very different welfare laws. Understanding that is what turns footage from something you look away from into something you can act on at the supermarket, at the ballot box, and in a conversation with someone who disagrees with you.

How to read an investigation critically
QuestionWhy it mattersWhat a strong investigation shows
Who filmed it, and how long were they there?A single afternoon can catch an unusual day. Months of footage shows the routine.Named organisation, employment records, continuous date-stamped material.
Is the practice legal?Illegal abuse can be prosecuted. Legal standard practice can only be changed by law or demand.The relevant regulation cited alongside the footage.
Was it corroborated elsewhere?One site proves one site. Several sites prove a system.Parallel investigations, inspection reports or an industry statement.
What did the company and the regulator say?Responses reveal whether the facility was an outlier or a certified supplier.Published statements, audit status, certification labels held at the time.
What changed afterwards?Outcomes separate campaigns that shifted policy from footage that circulated and faded.Prosecutions, contract cancellations, legislation, retailer policy changes.

Swipe sideways to read the full table.

Keep going

What investigations have actually changed

Documented footage has a measurable legislative record. These are reforms that trace directly back to investigative material rather than to voluntary industry initiative.

  • Gestation crate bans for pigs across the EU, the UK and a growing list of US states.
  • The phase-out of conventional battery cages for laying hens in the EU and UK.
  • Prohibitions on fur farming in more than twenty European countries.
  • Legal recognition of cephalopod and decapod sentience in UK animal welfare law.
  • Commitments to end the maceration of male chicks in France and Germany.
  • Mandatory CCTV in slaughterhouses in England, following repeated undercover findings.
  • Retailer and food-service policies dropping suppliers after footage was published.
  • Line-speed and stunning-efficacy audits added to several national inspection regimes.

How to use this reporting without burning out

  1. 1

    Read one, not six

    Pick the industry closest to what you currently eat. One investigation read properly changes more behaviour than six skimmed.

  2. 2

    Check the primary source

    Every summary links the original footage or report. Follow one link so you know the material is real and not an internet rumour.

  3. 3

    Separate the legal from the criminal

    Note which practices were standard and lawful. Those are the ones your shopping and your vote can change.

  4. 4

    Convert it into one decision

    Swap the single product most connected to what you read. A specific swap beats a vague intention to eat less of everything.

  5. 5

    Share the source, not the shock

    When you talk about it, lead with the regulation and the corroboration. It travels further than a distressing still image.

  6. 6

    Set the material down

    Distress is not a strategy. Give yourself a limit, then go and cook something. Sustained change comes from people who did not exhaust themselves in week one.

Sources: Poore & Nemecek (Science, 2018), FAO, USDA FoodData Central, Mekonnen & Hoekstra (2011).

Questions about investigative footage

Isn't undercover footage always the worst-case farm?
Sometimes, and that is a fair challenge. It is why corroboration matters more than any single clip. When the same practice appears across investigations in different countries, at certified sites, and in government inspection reports, it is describing an industry norm rather than one bad operator.
Are these practices illegal?
Often not. Much of what is most disturbing in this footage — crating, mutilations without pain relief, stocking densities, high-speed stunning — is lawful standard practice in the jurisdiction where it was filmed. Where laws were broken, we say so and note any prosecution.
Do higher-welfare and organic labels avoid this?
They reduce some harms and not others. Labels typically improve space and enrichment, and they rarely change slaughter, transport, male-chick culling or genetic selection for growth. Several investigations here were filmed at certified sites.
Isn't undercover filming illegal itself?
It depends on the country. Several US states passed so-called ag-gag laws to criminalise it; a number have since been struck down on free-speech grounds. In much of Europe it remains a recognised, if contested, form of public-interest journalism.
Why summarise the footage instead of showing it?
Graphic imagery makes many people close the page, which means the information never lands. A careful written summary with sourced links reaches more readers and lets you choose whether to view the original.
What is the single most useful thing to do after reading one?
Change one recurring purchase. The demand signal from a weekly shop repeated for a year is more consequential than a one-off emotional response, and it is the mechanism every reform on this page ultimately relied on.

How we source and verify

Summaries draw on published material from Mercy For Animals, L214, Animal Equality, Open Cages, Direct Action Everywhere, Compassion in World Farming and The Humane League, cross-checked against government inspection data, EFSA opinions and peer-reviewed animal welfare science. We link the primary source for each claim, note company responses, and correct anything shown to be wrong — write to us if you find an error.