Dogs may cry tears of joy when they reunite with their owners, according to researchers in Japan.Subscribe to FOX 13 Seattle: ... ... <看更多>

research, human, dog | As if dogs couldn't get any sweeter, new research suggests they can actually cry tears of joy when reunited with ... ... <看更多>

Apr 2, 2015 - One day I will only cry tears of joy! :') ... <看更多>