My parents once had a business next to a Asian restaurant. My mom frequently grabbed lunch there, great food and friendly service. One day there was a closed notice on the door and my dad's plumbing friend was there. Of course, he called him later than night for the tea. The plumber said the sewer was clogged and there were "cat bones and skulls" in it so they had to call the health department. My mom still isn't bothered by this and never was, she said whatever they used didn't make her sick and was very tasty, sooo IDK couldn't be that bad I guess.