We all love coming home to our beloved pups after a long break, and for the most part our dogs love it too.
But new research has suggested that dogs may even shed a tear of joy when they are reunited with their owner. Well, maybe not 'shed' as a dog's tears do not fall like they do in humans - but a new study has found that there may still be 'happy tears' in their eyes.
The research was carried out by Azabu University in Japan, after a researcher noticed that his dog appeared to tear up when nursing her pups. Noticing the tears, the researcher wanted to find out what would trigger them and whether happiness could cause dogs to cry.
