Table 4.

Mean ± s.e. (range) of the total frequency and duration of behavioural signs of oestrus in non-lame and lame cows (Adapted from SL Walker, personal communication)

Oestrous signs		Total frequency	Duration (h)
Sniffing vulva	Non-lame	20.2 ± 3.1 (0 to 41)	13.2 ± 1.2 (0 to 18)
	Lame	21.9 ± 3.1 (1 to 49)	12.0 ± 1.2 (3 to 21)
Chin resting	Non-lame	36.3 ± 5.6 (16 to 78)	14.4 ± 1.3 (3 to 24)
	Lame	*24.4 ± 3.6 (0 to 59)	12.0 ± 1.3 (0 to 21)
Mounting rear of another cow	Non-lame	14.1 ± 3.4 (1 to 42)	11.4 ± 1.6 (3 to 24)
	Lame	**6.1 ± 1.1 (0 to 19)	9.3 ± 1.3 (0 to 18)
Mounted but did not stand	Non-lame	2.1 ± 0.7 (0 to 10)	5.2 ± 1.5 (0 to 15)
	Lame	0.9 ± 0.4 (0 to 7)	**1.8 ± 0.7 (0 to 12)
Stood-to-be-mounted (STBM)	Non-lame	9.3 ± 2.0 (2 to 26)	10.0 ± 1.2 (3 to 18)
	Lame	5.8 ± 1.4 (0 to 18)	6.8 ± 1.3 (0 to 15)
Total intensity points	Non-lame	2200 ± 300
	Lame	** 1400 ± 200

Lower values in lame cows (n = 18) compared to non-lame (n = 15) are shown in bold.

^*P<0.10,

^**P<0.05