Allegations were made about the number of horses sent to abattoirs since 2019.
Irish officials say they 'knew nothing' about alleged issues in the horse racing industry.
A BBC Panorama found 4,000 former racehorses have been slaughtered at British and Irish abattoirs since 2019.
And it said a majority were trained in Ireland.
Kevin Smith, the assistant secretary general at the department of agriculture, says he knew nothing of the allegations.
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