The REAL problem, aside from the burocraps being on the take (read owned outright by the Bilderberg group), is finding an honest butcher... Maybe you will be the first on the planet!
Have you EVER heard of a butcher who buys meat?
Have you ever been to a livestock auction and seen what "upmarket" "respectable" retailers and butchers buy for YOUR table? Scare the bejesus out of you, guaranteed!
The only way to do it is to sell LIVE ANIMALS, then the services of feeding, handling, etc, slaughtering, butchering. Then you know what is going into it = crutial these days = and know that you are not getting YOUR carcass back (and not the seemingly standard "butcher switcheroo" )
Either that or do it yourself, or You could hire someone to come & slaughter it for you, so you know there's no behind your back fiddle, or you can send it to an abatoir to do "the deed", bring it home & cut it up on your kitchen table. If you go the abatoir route, you can watch the whole process. if they will not allow you to watch, go elsewhere as they are clearly trying to hide something.
Doing your own butchering Might not be as pretty as packages from the shop, but what's inside willc be a known quantity, not filth, deception, injected water, fillers in sausages, someone elses year old carcass, weights with thumb on scale.
Sadly, this is the voice of experince.