Defra launched a pig CO2-stunning consultation today, a practice its own scientists called unacceptable in 2003. Twenty-three years on, there is still no ban date, no consultation document, and no way to respond.
Estimated reading time: 7 minutes
In short. Defra's press office published "New plans to end carbon dioxide stunning of pigs to prevent suffering" at 00:01 on 26 October 2026, announcing a consultation open until 21 December 2026 [1]. The underlying evidence is not new: the department's own Animal Welfare Committee found the practice causes avoidable pain, distress and fear, and that "since 2003 there have been no significant alterations" to the systems used (para 104, page 27) [2]. Three documented gaps: no consultation document, proposals paper or response form exists anywhere on GOV.UK to support the claim that a consultation has launched; the announcement sets no date for ending the practice, 23 years after the five-year phase-out first recommended in 2003; and the claim to protect consumers from cost impacts is made without any published figures, despite the government's own advisers being excluded from the cost discussions and warning of a two-to-threefold cost increase. Three mistakes: four stars.
High-concentration carbon dioxide is how roughly nine in ten pigs reared in England and Wales are stunned before slaughter, using paternoster "controlled atmosphere stunning" systems installed in a dozen processing plants [2]. The Farm Animal Welfare Council, the Animal Welfare Committee's predecessor body, said in 2003 that the practice was "not acceptable" and recommended it be phased out within five years [2]. The European Food Safety Authority repeated the recommendation in 2004 and again in 2020 [2]. The Animal Welfare Committee's own opinion, sent to government in July 2025 and published 16 October 2025, found nothing had changed in the intervening two decades and recommended the method be prohibited outright [2]. Today's announcement is the government's first formal response. Read against the document it cites as its evidence base, it falls short of what that evidence recommends in three separate, checkable ways.
The claims, tested
| The document's own words | What the public record shows | Verdict |
|---|---|---|
| "The consultation launched today will seek views on the proposals, including the welfare benefits, costs, feasibility and potential timescales for moving away from carbon dioxide" [1] | As of this check, GOV.UK's own live listing of Defra's policy papers and consultations, sorted by most recently updated, carries nothing dated 26 October 2026, no open consultation document and no response form anywhere under this title [3]. The press release's only outbound link is to the year-old scientific opinion, not to any proposals document [1] [2] | A consultation was announced to collect views; there is nowhere on GOV.UK to give them |
| Animal Welfare Committee chair Madeleine Campbell, quoted in the release: "I hope that all stakeholders will now work together... and deliver that change within a transition period which is as short as possible" [1] | The Committee's own written opinion puts a hard number on "as short as possible": any transition period "should be as short as possible and in any case within five years" (para 136, page 30), echoing the five-year phase-out the Committee's predecessor first recommended in 2003 (para 37, page 12) [2] | Twenty-three years after its own advisers' original deadline, the government commits to no date at all, not even the five-year outer limit it is quoting selectively |
| "The government has been working with pig processors, equipment manufacturers, gas suppliers and animal welfare organisations since April 2024... to ensure minimal impact of costs to consumers" [1] | The Committee's opinion records that Defra "collated data from industry stakeholders regarding potential cost" but that "the AWC working group are not party to these discussions" (para 97, page 25), and separately cites the EU PigStun project's estimate that an argon-based system would cost "2 to 3 times higher" per pig than current CO2 systems, with increased dwell times that "could reduce the capacity of the processors" (para 97, page 25; para 112, page 28) [2] | A cost claim is made about a sector-wide change estimated at two to three times current running costs, with no published figures and the government's own welfare advisers kept out of that conversation |
The mistakes, counted
No consultation document exists to support the claim that a consultation has launched (1). The press release states plainly that "the consultation launched today will seek views on the proposals" and names four things it wants views on: welfare benefits, costs, feasibility and timescales [1]. A consultation on GOV.UK ordinarily means a published document setting out proposals and a way to respond, tracked under the "open consultation" content type. No such document exists for this announcement. Defra's own live search listing of its policy papers and consultations, sorted newest first, shows nothing published on 26 October 2026; the government's full catalogue of open consultations contains nothing about pigs, carbon dioxide or stunning [3]. The only outbound link in the press release goes to the Committee's year-old opinion, not to a proposals document [1] [2].
Twenty-three years after the first phase-out recommendation, the announcement commits to no date (2). The Farm Animal Welfare Council called for a five-year phase-out in 2003, a deadline that fell in 2008 [2]. The European Food Safety Authority repeated the call for non-aversive alternatives in 2004 and 2020 [2]. The Animal Welfare Committee's own 2025 opinion found "since 2003 there have been no significant alterations to systems deploying high concentration CO2 for the stunning of pigs" (para 104, page 27), and recommended that any further transition period be "as short as possible and in any case within five years" (para 136, page 30) [2]. The press release quotes the Committee's chair calling for a transition "as short as possible" but does not repeat the Committee's own five-year ceiling, and names no date, interim milestone or review point of its own, only an eight-week window for comments closing 21 December 2026 [1].
The claim to protect consumers from cost impacts is made without a published cost assessment, and the government's own welfare advisers were not consulted on costs (3). The press release states the government has worked with industry "since April 2024... to ensure minimal impact of costs to consumers" [1]. The Committee's opinion, the document the announcement cites as its evidence base, records that it was not party to Defra's cost discussions with industry, and separately notes the EU PigStun project's own estimate that converting to argon would cost two to three times more per pig in running costs than current CO2 systems, before accounting for the extra labour, electricity and maintenance a parallel second line might need to maintain throughput (para 97, page 25) [2]. It also warns that a longer dwell time "could reduce the capacity of the processors" in the short term (para 112, page 28) [2]. No cost-benefit analysis or impact assessment accompanies today's announcement to show how a sector running at 90% throughput on the cheaper method absorbs that increase without it reaching consumers.
Credit where due
The underlying welfare case is not in dispute, and Defra does not pretend otherwise: the press release links directly and prominently to the Committee's opinion rather than burying it, and quotes the Committee's chair in unusually blunt terms, calling the continued use of high-concentration CO2 "ethically unacceptable" [1] [2]. The opinion itself is a careful piece of work, weighing welfare against meat quality, operator safety and commercial throughput rather than treating the question as one-sided, and crediting Defra with having co-funded research into alternative stunning methods since before the Committee was asked to report [2]. The government's engagement with industry, gas suppliers and welfare groups predates the opinion by over a year, which is a genuine head start rather than a standing start. None of that is undone by the gaps above; it is the reason the gaps are worth pointing out before the consultation period runs its course.
Verdict
Four stars, from three documented mistakes. The welfare case for ending high-concentration CO2 stunning of pigs is not new and not seriously contested, including by Defra itself. What the department actually published this morning is a press release that describes a consultation, quotes its own scientific advisers selectively, and asserts a cost claim with no cost figures attached. Each of those three gaps is checkable against the one document the announcement itself cites. Closing them does not require new research. It requires publishing what the government says it already has.
The star score counts three documented mistakes. First, the press release claims a consultation has launched to collect views, but no consultation document, proposals paper or response form exists anywhere on GOV.UK as of this check. Second, the announcement sets no date for ending high-concentration CO2 stunning, 23 years after the five-year phase-out first recommended in 2003 and reaffirmed by the government's own Animal Welfare Committee in 2025. Third, the claim to minimise cost impacts on consumers is made with no published cost assessment, while the cited evidence records the government's welfare advisers were excluded from the cost discussions and separately estimates a two-to-threefold per-pig cost increase. Three falls in the 1 to 3 band: four stars; the bands are on the ratings page. This piece makes no finding about the conduct of any named individual; drafting and publishing a press release is an institutional process, not any one official's decision. Checked directly against the press release and the Animal Welfare Committee's opinion, both fetched 26 October 2026.
Sources
- New plans to end carbon dioxide stunning of pigs to prevent suffering, Department for Environment, Food and Rural Affairs, published 26 October 2026
- Opinion on the welfare impacts on pigs of high concentration CO2 gas stunning and of potential alternative stunning methods, Animal Welfare Committee, dated July 2025, published 16 October 2025
- Policy papers and consultations: Department for Environment, Food and Rural Affairs, GOV.UK, checked 26 October 2026