Table 2.

Definition and description of pig behaviors.

Activity Level	Behavior	Description
Moving	Feeding	Head into the feeding trough and swing up and down. [11]
	Motoring	Walking, running or jumping. [12]
	Mounting	One pig lifts its two front legs and puts these or its sternum on any part of the body or head of another pig, is the most widely used indicator of reproductive behavior for estrus detection. [13]
	Scratching	Rubbing body against pen fixtures or rolling on the ground. [12]
Staying	Lying	Head resting against the ground and not moving, body (parts) may make sharp, sudden, short-lasting movements. [12]