Table 3.

Ethogram of the behavioural parameters assessed.

Behaviour	Description	Sampling Method
Positive social	An affiliative interaction including sniffing, nosing, licking, or any social behaviour without a response from the receiver animal	Scan and continuous
Negative social	An aggressive interaction including biting, knocking, or any social behaviour with a flight or reaction response from the receiver animal	Scan and continuous
Exploring enrichment	Play or investigate by sniffing, nosing, licking, or chewing the straw or other enrichment material	Scan and continuous
Pen investigation	Sniffing, nosing, licking, or chewing all features of the pen	Scan
Resting	Animals lying ventrally or laterally and not showing any exploratory, positive, or negative social behaviour	Scan
Other	Other active behaviours, such as eating, drinking, or air sniffing	Scan
Eating	Ingestion of feed from the feeder	Continuous
Drinking	Ingestion of water from the drinking supply	Continuous
Tail biting	Having the tail of another pig in its mouth biting, chewing, or pulling it	Continuous
Ear biting	Having the ear of another pig in its mouth biting, chewing, or pulling it	Continuous