This been bothering for so long. There was Mexican commercial that aired either telemundo or univision (around 2007/2008). It was commercial for maybe a tv show, the ad opens with a white screen and texts in Spanish with blood drip on the screen and later shows footage from a slaughterhouse and pig corpses. Then it ends with people (looks like they're getting interview or something?) and a logo that has blood. It's all can remember and it terrified me as a kid. I tried finding it but my Spanish is not good and doesn't got me anywhere.