Table 3.

Ethogram with behaviours scored during the attention bias test.

Behaviour (duration)	Definition
Standing	All four hooves are on the pen floor with limbs extended and without more than 1 step within 1 s
Walking	The piglet takes at least 2 steps within 1 s
Running	A fast paced movement involving all four legs
Vigilant	The head positioned at shoulder height or higher
Attention to threat	The head oriented towards the direction of the threat
Exploring	Sniffing or licking the floors, walls or pen fixtures
Interacting with toys	Touching, sniffing or manipulating toys
Conspecifics directed behaviours	Sniffing or licking the gate or positioning the snout between the bars
Rooting	Snout movement along the floor in the straw in area 3
Location	Time spent in zone 1, 2, 3 and 4