Table 1.

Behavioral categories and description.

Behavior category	Description
Sitting on eggs	Hen sitting continuously on the egg
Turning of eggs	Hen turns the egg with her beak intermittently or moves her body gently against the egg
Feeding	Hen leaves nesting position and directs its beak into the feed trough and starts pecking at the feed
Drinking	Hen leaves nesting position and directs its beak into the bowl drinker to drink water
Eyes open while sitting on eggs	Hen maintains nesting position with the eye opened
Eyes close while sitting on eggs	Hen maintains nesting position but intermittently closes the eye