Go to any nightclub on a weekend around midnight and you’ll likely find two people drunk and willing to fight over nothing in particular. In most cases, their friends will intervene and stop the fight before it starts just because fighting is rarely worth it.
Now someone managed to capture of a video of a dog doing just that with a cat. For some reason, one cat has a leash and starts approaching another menacing cat. That’s when the dog swoops in and grabs the first cat by the leash to hold him back, thereby averting a cat fight and possibly sparing his friend a trip to the vet.