Personally never heard of it. As you may know that not even Pakistani Christians consume pork (or atleast thats what they say).
However I know of a case where locals supplied dogs n stuff to chinese working on CPEC project.
As for me, I dont really like beef.
And I rarely eat from “suspicious” places..
Even when im travelling I buy snacks like chips,red bull and chocolates.
I had a really bad experience once .. ate chicken at such a place on my way to multan.. and damn brother, had to spend the next 2 days in a hospital due to food poisoning..