Table 3.

Distribution of claw trimming routines in 559 Norwegian dairy herds by DD category (DD+/DD−) stratified on housing system

Trimming routines	Free stalls		Tie stalls
	DD+ (n = 108)	DD− (n = 281)	DD+ (n = 5)	DD− (n = 165)
	n (%)b	n (%)b	n (%)b	n (%)b
Certified prof trimmer trims  ≥ 90% of cowsa
No	5 (4.6)	42 (14.9)	0	24 (14.5)
Yes	103 (95.4)	239 (85.1)	5 (100)	141 (85.5)
Missing	0	0	0	0
Uncertified prof trimmer trims  ≥ 30% of cowsa
No	104 (96.3)	259 (92.2)	5 (100)	150 (90.9)
Yes	4 (3.7)	22 (7.8)	0	15 (9.1)
Missing	0	0	0	0
Owner trims  ≥ 30% of cowsa
No	108 (100.0)	260 (92.5)	5 (100)	156 (94.5)
Yes	0	21 (7.5)	0	9 (5.5)
Missing	0	0	0	0
Trimming frequency a
< 1/year	10 (9.3)	66 (23.5)	0	65 (39.4)
1<2/year	33 (30.6)	116 (41.3)	2 (40.0)	81 (49.1)
2<3/year	48 (44.4)	85 (29.2)	3 (60.0)	19 (11.5)
≥ 3/year	17 (15.7)	14 (5.0)	0	0
Missing	0	0	0	0
Cleaning of feet in chute before trimming
No	54 (50.0)	179 (63.7)	2 (40.0)	93 (56.4)
Yes	47 (43.5)	69 (24.6)	3 (60.0)	53 (32.1)
Uncertain	7 (6.5)	33 (11.7)	0	19 (11.5)
Missing	0	0	0	0
All cows trimmed/ examined at routine trimming
No	11 (10.2)	39 (13.9)	0	9 (5.6)
Yes	97 (89.8)	241 (86.1)	5 (100)	152 (94.4)
Missing	0	1	0	4
All pregnant heifers trimmed/ examined at routine trimming
No	78 (72.9)	206 (74.1)	3 (60.0)	96 (58.9)
Yes	29 (27.1)	70 (25.2)	2 (40.0)	64 (39.3)
Uncertain	0	2 (0.7)	0	3 (1.8)
Missing	1	3	0	2
Trimming chute and equipment look clean at arrival
No	1 (0.9)	1 (0.3)	0	1 (0.6)
Yes	104 (96.3)	275 (97.9)	5 (100)	161 (98.8)
Uncertain	3 (2.8)	5 (1.8)	0	1 (0.6)
Missing	0	0	0	2

^aData from NDHRS

^bMissing not included in %