To be honest, I don't think there is any other species so horrible. Cats sometimes "play" with mice before killing them, but that is only one at a time and not organised, mass killing like these horrible killing competitions or mass hunts.
At a risk of (temporarily) shifting the topic, cats do not actually play with rats and mice for fun; it is actually a genetic instinct to kill cautiously. There is an explanation here (it is necessary to read all the way down to "Why doesn't she just kill the poor mouse?"):
https://www.dw.com/en/cats-are-neither-m...a-45002369
So it looks like humans are the only species to organise competitions to kill other species just for fun....
At a risk of (temporarily) shifting the topic, cats do not actually play with rats and mice for fun; it is actually a genetic instinct to kill cautiously. There is an explanation here (it is necessary to read all the way down to "Why doesn't she just kill the poor mouse?"):
https://www.dw.com/en/cats-are-neither-m...a-45002369
So it looks like humans are the only species to organise competitions to kill other species just for fun....
