So do horses. They'll gobble down a little chick if one walks past when they're grazing. The most disturbing thing I've seen though was when a pelican swallowed a live seagull whole.
I remember this thing in NPR about the kind of grudges male hippos make.
The story was about a tour guide that would take people down the Nile (iirc,) and there was this one particular hippo that would come out and be a dick every time he was on the water.
Well, this guy moves away for whatever reason. The hippo goes away, stops bothering people.
Then the dude came back, like years later, doing guided tours again. Asshole hippo is on the water and tries to kill him again. Like. Flips the boat then drags the dude under. I forget if the hippo let him go or got shot or whatever, but yeah.