Dyfed Powys Police and the FSA will today begin interviewing the three men arrested on suspicion of offences under the fraud act.
The arrests follow a joint operation with the FSA at Farmbox Meats in Aberystwyth and the Peter Boddy Slaughterhouse in Todmorden, West Yorkshire.
Two men aged 64 and 42 were detained at Aberystwyth police station over night and a 63 year old man arrested in Yorkshire has today been transported to Aberystwyth.
Interviews with the three men are likely to continue through the day.
Meanwhile Dyfed Powys Police officers will maintain a presence at the site in Aberystwyth.
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Outbreaks of light rain or drizzle expected around the coast and hills.
Mike and Cynthia from Ystradgynlais flew out to the German city for a weekend away.
Fine and dry at first but becoming largely cloudy with outbreaks of rain or drizzle.