Welfare standards are not policed on the eu.
That is absolutely not true, and if you or your relatives worked in agriculture you would not have posted that.
Welfare standards and food handling standards are very high.
Specs for, for instance, milking parlour equipment, are detailed and specific, and if your farming relatives live and work in Ireland and are members of a co-op (most are) then the co-op tests all the milk.
In the UK the NMR provides vital lab services for the farming sector.
Basically, the expectations of the EU market, which are based on regulations, force farmers and processors to remain in good standing.
Then there are the geographical indications and traditional specialties certifications that the EU provides, and which it polices.