Table 1.

Variables measured as part of routine production.

house	management	mortality	abattoir processing
floor area	placement date	weekly numbers	rejections and downgrades (%)
	number of birds placed	culls per week	hock burn (%)
	number and age category of parent flocks	in transit
	bird sex
	rearing system (Standard or Freedom Food (RSPCA 2008))
	daily water consumption
	average weekly weight