I'm not dumb, but i know a warning sign when I see one! It was left purposely, to leave a message and to make sure it gets out. I been really pissed lately too and feel that my life could be in danger, maybe they are speaking up about it, maybe one day we should start to thank them for life!
One way to find out though is to put an RFID chip on all cows and even inside them somehow, then when something happens to one of them , you can follow the chip! Just like the Govt. does us all!