Studies of various species including dogs, have shown that animals naturally tend to lean toward either Optimism or Pessimism. 

Here’s an interesting study about just that. Dogs can be pessimists, according to new study | Carrington College

The cool thing is, with Concept Training we can help dogs who are either naturally more pessimistic or who have become pessimistic due to a negative experience to become more optimistic!

You’ll find some Optimism games by clicking on Optimism in the concept list at the top of the main videos page.