Is Your Dog Optimistic or Pessimistic?

When presented with something new or slightly unusual, does your dog respond positively, presuming it to be good (optimism), or negatively, presuming it to be a bad thing (pessimism)?

Optimism

Developing optimism involves many positive experiences, but also fair challenges (so the dog can practice successfully stretching its comfort zone, working through manageable difficulties and recovering from failure to try again).