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. 2019 Apr 17;14(4):e0214070. doi: 10.1371/journal.pone.0214070

Table 2. Ethogram of broiler welfare problems recorded during transect sampling, and subsequently pooled categories.

Indicator Description Category
Lame Walks with obviously uneven strides or unsteady steps. May exhibit outward or inward twisting of one or both legs leading to severe limping. Lameness is clearly advanced rather than in early stages. Walking difficulties
Immobile Does not move away when approached or moves by propping on wings or crawling. If gently nudged, moves with difficulty, no more than three steps before sitting down again.
Sick Signs of impaired health, including small and/or pale comb, red, watery or closed eyes, retracted neck and disarranged/raised feathers. Usually found in a resting position. Includes wry neck. Illness
Terminally ill Lying with head resting on ground or lying on back, with signs of being close to death (e.g. laboured breathing, half-closed eyes). Excludes panting related to heat stress.
Dead No signs of life.
Head wounds Skin scratches on head or neck indicated by the presence of fresh or dried blood/scabs visible from 1–2 m away. Skin wounds
Back wounds Skin scratches on back (between neck and tail) and/or wings indicated by the presence of fresh or dried blood/scabs visible from 1–2 m away.
Tail wounds Skin scratches around tail and hips indicated by the presence of fresh or dried blood/scabs visible from 1–2 m away.
Small Stunted growth. Approximately half average size of flock mates. May have yellow downy feathers, especially on head. Small
Dirty Extensive dark staining of body sides, wings, chest, back, and/or tail feathers due to prolonged contact with wet litter. Excludes light soiling or discolouration of feathers caused by dust, peat or excrement. Not observed
Featherless Lacking feathers on majority of back and wings. Excludes moulting. Not observed