 Alternatively, if chicks cannot see the food choice, and their companion is simply a competitor for food, then DC individuals become more DC and only take the familiar food.
<meaning-changed>  Alternatively, if chicks cannot see the food choice, and their companion is simply a competitor for food, then DC individuals become more DC and only take the familiar food.
 Alternatively, if chicks cannot see the food choice, and their companion is simply a competitor for food, then already-conservative individuals become more DC and only take the familiar food.