Figures & data
Figure 1. 1a: Subcutaneous haemorrhage and skull fracture below the ear canal. 1b: Fracture of dorsal cranium in the first submission. 1c: Fracture of the dorsal cranium in the second submission. 1d: Extensive trauma to the cerebrum and optic lobe, deep to the fracture.
Figure 2. 3D VR CT image of the chicken skull viewed from the dorsal aspect, with the rostrum to the upper left of the image showing a linear defect with rounded rostral expansion matching the trough lug (arrow).
Figure 3. Short axis (or axial) multiplanar reformatted CT image of the chicken skull at the level of the temperomandibular joint, demonstrating a depressed fracture fragment entering brain (arrow).
Figure 4. Moving feed hopper coming towards the camera with feed banking up on the green feed leveller (see online for colour). Birds were observed putting their heads further into the trough when less feed was present. The sheet metal lug is shown with an arrow. The producer later found blood on some of these lugs in cages where dead birds occurred.
