[readhn]

dogs were built up by humans. dogs are connected to humans on emotional level, so this is not surprising.

[Sharlin]

Eh, it's extremely unlikely that dogs have developed any totally new types of emotions during the domestication process. More like they were easy and useful to domesticate because as intelligent, mammalian, social pack predators, their ancestors were already a good fit for humans, mentally.

[hellotomyrars]

There are papers/studies that show that dogs have facial muscles that wolves lack that effectively give them expressive eyebrows. You could argue this is the result of human selective breeding but it does allow them to portray emotion in a way wolves can’t. Not sure how one would define “new emotion” but certainly their ability to communicate emotion to people at least has changed/increased.