Table 5.

Effect of genetic background on the mortality of non-beak-trimmed pure line laying hens.

Age (Weeks)	Mortality
	Line 1		Line 2		Line 3		Line 4
	n	%	n	%	n	%	n	%
20–46	3	10.0	2	6.6	0	0.0	4	13.3
46–62	6	20.0 bc	2	6.6 ab	1	3.3 a	11	36.7 c
20–62	9	30.0 bc	4	13.2 ab	1	3.3 a	15	50.0 c

^a,b,c Different letters in the same row indicate significant differences (p < 0.05).