Can dogs tell if you're happy or sad? Yes, scientists found that dogs can really understand people's feelings. When dogs see happy faces, the reward part of their brain is activated. This means that dogs love happy faces and get excited when they see them. A study at the University of Vienna looked at the brains of 14 dogs and showed them pictures of different human emotions. The dogs saw happy, angry, scared, and sad faces. Scientists found that when dogs saw happy faces, the reward part of their brain was activated. Did you know that dogs' brains work in a similar way to humans'? This means that dogs can understand our feelings and communicate with us. Dogs have a special talent for understanding human emotions. Dr. Laura Cuaya, one of the lead researchers, said that when dogs see happy faces, their brain's reward system is activated, which shows that dogs love happy faces. Dogs can understand human emotions because they have a special talent for reading facial expressions and sounds. This talent helps dogs communicate with us. This study is important because it helps us understand how dogs can communicate with us. When dogs see happy faces, their brain's reward system is activated, which shows that they love happy faces. This is a big step in helping dogs communicate with us. Dogs are special friends because they can understand our emotions. They are very good at reading our feelings and communicating with us.