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Feather loss is caused by pecking from other birds, rubbing against the small, wire battery cage, and<br />
internal stress. An extreme lack of feathering causes hens to be more vulnerable during transport. When<br />
exposed to rain, snow and road spray during transport, wet (or non-existent) feathers affect the hens’<br />
ability to keep warm. Spent hens are small birds, and they are unable to produce sufficient heat to<br />
regulate their internal temperature.<br />
Birds die during transport from lack of feather cover, decreased robustness, exposure for long periods in<br />
inconsistent humidity, and high and low temperature extremes. A wide distribution of DOAs on the truck<br />
coincides with a poorly ventilated ‘thermal core’ 25 and passive ventilation on the trailer.<br />
Spent hens are frail and vulnerable, and it is recognized by the CFIA that some birds will die during<br />
transport as a matter of course. As noted, CFIA policy dictates an investigation be undertaken by their<br />
inspectors and veterinarians when a 4% threshold of spent hen deaths occurs. Because Trailer 23 had<br />
10.8% DOAs, an investigation was undertaken, which ultimately resulted in a charge being laid.<br />
25<br />
Thermal core refers to the central part of the trailer.<br />
Economics over animal welfare [ 16 ]