We should smile at our dogs - a new scientific study reveals why

"So this finding suggests that happy faces, even those of strangers have a positive value for dogs."

— Laura Cuaya , Academic

"Dogs can distinguish between positive emotions and all the others, but they don't seem to be able to distinguish between the different negative emotions."

— Raúl Hernández-Pérez , Academic

"They are really good at understanding emotions in humans - a species that is completely different from them."

— Laura Cuaya , Academic

"We can reward our dogs with treats, but also reward them with happiness."

— Laura Cuaya , Academic