Speaking of cows, they do use one of those to grind up diseased dead cows at slaughter houses.
There is actually a video online showing it, but beware, someone put a soundtrack to it of a cow. So it sounds and looks as if the cow is alive going in. Hard to watch, even though you know the cow is dead.
The website that explains it. No video though on this part. You have to follow a couple links to find it. Again, this is only the website to explain it. Plus if you wish to follow the links to the video, there is only the soound of the machinery, this is not the video with the soundtrack added to it. Look for that on your own. lol
There is also a video of an engine block being ground up on another site you can look up. These machines are powerful and are used all over.