Table 1.

Description of the behaviours of piglets [following 5,14,15]

1. Body position
Standing	Body weight supported by four legs
Kneeling	Body weight supported by front carpal joints and hind legs
Dog-sitting	Body weight supported by hindquarters and front legs
Ventral lying, belly	Body weight supported by belly
Lateral lying, side	Body weight supported by side
2. Non-specific behaviour
Walking/running	Moving walking, trotting or galloping
By udder	Activity by the udder: suckling, massaging udder or looking for a teat
Nosing/chewing/licking	Nosing/chewing or licking material or the littermates/mother
Playing	Head shaking, springing (sudden jumping or leaping) or running. Can involve partners (gentle nudging or pushing, mounting, chasing, etc.)
Sleeping	Eyes closed while lying
Awake inactive	Eyes open doing nothing
3. Pain-related behaviour
Huddled up	Lying with at least three legs tucked under the body
Spasms	Quick sudden involuntary contractions of the muscles under the skin
Rump-scratching	Scratching the rump by rubbing it against the floor, pen walls or mother
Stiffness	Lying with extended and tensed legs
Prostrated	Sitting or standing motionless, with head down, lower than shoulder level
Trembling	Shivering as with cold. The animal may be lying, sitting or standing
4. Social cohesion
Isolated	Aside from other piglets, alone. A distance of at least ~40 cm separates the animal from the closest littermate
Desynchronised	Activity different from that of most (at least 75%) littermates (e.g. sleeps while most other littermates suckle)
5. Location
Heat-lamp	Sitting, standing, lying under the heat lamp