The goal of this single-arm study is to learn if a dog adoption and training program can treat, prevent in \[describe participant population/primary condition; could include any of the following: sex/gender, age groups, healthy volunteers\]. The main questions it aims to answer are: * Does the dog adoption and training program decrease posttraumatic stress symptoms in veterans with self-reported posttraumatic stress symptoms? * Does the dog adoption and training program decrease stress and improve psychosocial health in veterans with self-reported posttraumatic stress symptoms? * Does the dog adoption and training program decrease inflammation, increase oxytocin, and change the structure and resting-state function of specific brain regions in veterans with self-reported posttraumatic stress symptoms? Participants will: * Attend eight one-hour professional dog training sessions within a 10-week period. * Visit the clinical research unit four times during the study for data collection.
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Change in self-reported posttraumatic stress disorder (PTSD) symptoms from baseline to 4 weeks post-intervention
Timeframe: From enrollment to 4 weeks post-intervention