{
  "url": "https://openlegislation.uk/eu-regulation-2008-429/annex-IV/division-2",
  "json_url": "https://openlegislation.uk/eu-regulation-2008-429/annex-IV/division-2.json",
  "legislation": "eur/2008/429",
  "legislation_title": "Commission Regulation (EC) No 429/2008 of 25 April 2008 on detailed rules for the implementation of Regulation (EC) No 1831/2003 of the European Parliament and of the Council as regards the preparation and the presentation of applications and the assessment and the authorisation of feed additives (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2008-429",
  "path": "annex/IV/division/2",
  "kind": "division",
  "number": "2",
  "heading": "Table. Animal categories: Poultry",
  "text": "Category\nDefinition of the animal category\nApproximate duration period (weight/age)\nMinimum duration of long term studies for efficacy\nPeriod\nAge\nWeight\nChickens for fattening\nBirds raised for fattening\nFrom hatching\nUp to 35 days\nUp to ~1 600 g(up to 2 kg)\n35 days\nChickens reared for laying\nFemale birds being reared for consumer egg production or for breeding purposes\nFrom hatching\nUp to ~16 weeks\n(up to 20 weeks)\n—\n112 days (if the efficacy data are not available for chickens for fattening)\nLaying hens\nProductive female birds held for egg production purposes\nFrom 16-21 weeks\nUp to ~13 months\n(up to 18 months)\nFrom 1 200 g (white) 1 400 g (brown)\n168 days\nTurkeys for fattening\nBirds raised for fattening\nFrom hatching\nUp to ~14 weeks\n(up to 20 weeks)\nUp to ~16 weeks\n(up to 24 weeks)\nHens: up to ~7 000 g\n(up to 10 000 g)\nCocks: up to ~12 000 g\n(up to 20 000 g)\n84 days\nTurkeys for breeding purposes\nFemale and male birds held for breeding purposes\nWhole period\nFrom 30 weeks up to ~ 60 weeks\nHens: from ~15 000 g\nCocks: from ~30 000 g\nAt least six months\nTurkeys reared for breeding\nYoung female and male birds reared for breeding purposes\nFrom hatching\nUp to 30 weeks\nHens: up to ~15 000 g\nCocks: up to ~30 000 g\nWhole period (if the efficacy data are not available for turkeys for fattening)",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2008/429/annex/IV/division/2",
    "retrieved_at": "2026-11-01T14:52:17.021143+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}