They are implementing regulations that put smaller butcher shops out of business. That said, the regulations may be good, but if the burden is too high .... well you have a problem.
Accidents of policy do happen, but would you agree that it is suspicious that 4 food packing companies are making massive profits on such a 40-year-old accident and no one has thought to just fix it yet?
So if you have a body of law which enables the creation of these things, details how they are managed, and then they develop into oligopolies, this is not something that happens "naturally" -- it's a deliberate result produced by whoever controls those laws.
So supply prices rise as production falls... to the monopoly maximum marginal profit extracted from the consumer, just as predicted!