They introduced the stamp method (All slaughtered animals (excluding chickens and other smaller animals) requiring stamp before they hit the market). It worked, sort of......for some time.
Chickens are slaughtered right in front of you, so it's not that bad. Mutton and beef is where the main problem is...
Some people prefer getting slaughtered an entire small/young goat of their choice in front of their eyes, to avoid these problems.