Table 1.

Ethogram of gestating sows’ behavioral activity

Type of behaviour	Description of behavior
1. Total FAA	The average of all feeding related activity 1-hr before feeding (de Godoy et al., 2015); average per 15 min
2. Total feed activity	The number of 5 s periods that the model detected feeding behavior (eating and/or sham chewing); average value per 15 min for 24 hr.
3. Total activity	The number of 5 s periods that the model detected sow movement; average value per 15 min 24 hr

To record feeding activity, the ear tag accelerometer captures the movement of the head. The sow’s head has a distinct gyration when chewing. The model currently cannot distinguish between sham-chewing and the chewing of feed. “Active” behavior or activity is movement excluding “Feed” behavior and small motions such as dream tremors and very brief movements of the head (e.g., to shake a fly off).