A New Study states that not only Humans but also dogs have personality and mood traits that shape up to how they react in certain situations. The study revealed that, like humans, dogs' personalities are likely to change over time. Lead researchers from Michigan State University in the US state that Dogs personalities can also predict many important life outcomes suggesting that canines' personalities influence how close they feel to their owners, biting behavior and even chronic illness. When humans go through big changes in life, their personality traits can change.