When the old keeper forgot one latch, the 400-pound silverback reached through the steel

has known Tom’s movement patterns, scent, timing, and emotional state for most of his life,” Leena continued. “Tom’s illness is changing those things. On days when Tom hesitates more, repeats actions, loses sequence, or shows distress, Winston increases reassurance behaviors. On Tom’s clearer days, the behavior decreases.”

Miguel stared at the chart.continue reading …