Dogs shed "happy tears" when their owners come home and greet them, according to a new study. The research was carried out at Japan's Azabu University after a scientist spotted his pet pooch would seem to tear up when she nursed her puppies.
Professor Takefumi Kikusui explained that dogs produce tears but they don't fall like humans' do - so he was fascinated to learn more about their emotions. He said: "That gave me the idea that oxytocin might increase tears."
Prof Kikusui followed up his idea and found that dogs had more tears in their eyes than normal when reunited with their owners, reports the Mirror. Their base level of tears didn't change when they met someone they didn't know.
