There are traumatic events that are known - Hurricane Katrina, for example, immediately comes to mind - that alter the lives of the humans and animals that survive them. Then there are events that are unknown - the painful mysteries that follow untold numbers of animals into shelters and streets every year. Whether you are an animal lover who has intervened in disaster response or given a shelter critter a fresh start, chances are good that you have encountered a trauma survivor.
De-mystifying trauma
The term post-traumatic stress disorder (PTSD), commonly used in reference to the effects of witnessing battle, is an anxiety disorder that sometimes results from exposure to events that are unpredictable, uncontrollable and potentially life-threatening. People with PTSD experience a number of difficult symptoms, including hypersensitivity to the world around them, a persistent need to avoid reminders of the traumatic event, flashbacks or "intrusive" thoughts and physical markers of heightened anxiety (such as a racing heart rate, increased blood pressure and sweaty palms). While some may think that PTSD is an experience reserved only for humans, researchers have discovered that non-human animals may also develop signs of post-traumatic stress.
From war to wolves
Wild wolves relocated to captivity, as well as captive primates, have been shown to manifest behaviors eerily similar to the markers of PTSD. And "trauma" does not necessarily imply that physical injury has occurred. In fact, some folks (like veterinarian Temple Grandin) suggest that emotional terror is far more damaging to animal well-being than physical injury. In any case, feeling intensely threatened on a primal level is enough to change the way our mammalian brains function, all the way down to the synapses. These neural shifts, however subtle, can make it difficult for critters that have been terrorized to trust their caregivers or to cope with even the most benign noises and activities of daily life.
What to watch for
Not all survivors will develop behavioral problems. While we don't fully understand what makes one animal more resilient than another, we do know that some animals can come through horrific events without significant long-term effects. Others, however, may reveal behavioral problems over time, even when they look healthy and vibrant on the outside.
Signs of possible trauma include: