There is much traceability in food sector in the UK. In the UK a farmer has to tag and record ever cattle that is born, any medication it is given, record every time it is moved off the farm, the abattoir then has to record where it is killed and stamp the carcass accordingly. The Environmental Health of a Council can demand to view where the feedstuff for the cattle is stored. Certain feedstuffs are banned from being fed to animals. Chicken production takes it one step further and most of the main producers force the growers to use feedstuff which they supply.
I'm not sure where you get the idea from that abattoirs and locations are often kept secret? In the UK there are open records on abattoirs. There aren't many small ones left anymore and the majority of ones left are effectively huge factories.
Sorry as I may have got that wrong but I am sure I read some time ago that certain meat producing plants had their locations marked as secret presumably for biosecurity reasons? Maybe I got it wrong.
I agree there is much traceability in the food sector in the UK but when you examine it closely you discover that that transparency is not accessible to the general public.
Supermarkets would, and should, know what is going on with their suppliers but won't necessarily give their customers full details.
I suspect all the regulations act as punctuation marks in the journey from farm to plate. It is the gaps in between where farms, abattoirs (fuck me-can never spell it right!) take short cuts when noone is looking.
Sources: Morrissons scandal concerning chicken (
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Source: Just type "abattoir CCTV" into Google and take your pick