English: Volitional Visual Behaviors of Treated GUCY1*B Animal 2 The visual behavior of animal 2 was recorded at 3, 7, and 13 d of age. On days 3 and 7, animal 2 pecked at black printed dots on white paper (1, 2, 4, and 10 mm diameter), visually followed a black dot centered on a white flag, and pecked at shiny objects. On day 13, animal 2 repeatedly ran toward a member of the investigative team and pecked at shiny objects. The rapid, directed locomotion exhibited by animal 2 was never observed in untreated GUCY1*B animals and may have been a manifestation of behavioral imprinting to the investigator who raised it.