We all know that nonhuman animals (animals) are emotional beings. There are ample data that show that chimpanzees, elephants, and dogs suffer from post-traumatic stress disorder (PTSD, see and) and now a most fascinating discovery shows that, "Family dogs caught up in the Japan earthquake of 2011 and subsequent nuclear disaster at Fukushima showed signs of stress not inconsistent with PTSD long after the events."
In this research project, abandoned dogs rescued from Fukushima were compared with non-disaster affected dogs abandoned in 2009 and 2010, before the earthquake. The dogs who lived through and survived the disaster had stress hormone levels five to 10 times higher than the dogs who were abandoned or found as strays. In addition, the gap "narrowed but did not close even after 10 weeks of loving care in the rehabilitation program." The Fukushima dogs also remained detached from caregivers.