Facebook post by University of Helsinki

Which emotions do dogs experience? You can’t ask a dog to tell you how it is feeling. It’s possible to interpret some of its emotions from behaviour and body language, but not all of them. That's why Canine Mind research group is studying the minds of dogs with an algorithm that might someday help the pet owners to cope with behavioural problems.
What’s up, dog? - A new research helps pet owners to understand their dogs' emotions | University of Helsinki helsinki.fi

Just 30 years ago, people laughed at the idea of animals having feelings, but now researchers are studying how joy and stress manifest in dogs.