Every group of friends has that one mate who's a tad bit rude; or, then there comes that f*ckboy who doesn't treat you as well as he should be.

And your dog knows it.

Yep, new research has revealed that dogs can sense when someone is being rude to you, and acts accordingly because of it.

Scientists from Kyoto University conducted their research on 54 dogs and their owners. The owners were given a bottle and they had to pretend to struggle to open it while their dog was watching.

Then, an actor would come in and either help the owner open the bottle – or ignore them and walk out of the room.

After this, the owner and the actor offered the dog a treat, and you can probably guess what happened next… if the actor helped the owner, the dog would go to them for the treat, but if they hadn't helped, the dog would ignore them and take the treat from the other person.

All of the pet pooches were able to judge each individual based on observed behaviour.

So, that friend who stole your last chocolate biscuit, and that guy who slagged you off; they're probably both hated by your dog.

The research, which was published in Neuroscience & Biobehavioural Reviews, was actually an extension from the 2011 study which saw dogs be more open to people who gave food to the homeless.

See? Dogs are just the best.