TABLE 4:

Duration and frequency of diarrhoea and bovine respiratory disease in preweaned calves based on once-weekly assessment using a modified Wisconsin-Madison health scoring system*

	A	B	C	D	E	F	G	H	I	J	K	Total n/%
n calves	54	36	48	51	48	39	35	54	56	26	45	492
n deaths (%)	2 (3.7)	3 (8.3)	3 (6.3)	2 (3.9)	2 (4.2)	1 (2.6)	1 (2.9)	1 (1.9)	4 (7.1)	2 (7.7)	1 (2.2)	22 (4.5)
Diarrhoea
0 w	41	19	19	22	30	10	20	30	27	11	26	255
1 w	12	15	22	23	16	18	13	15	20	10	16	180
2–3 w	1	2	7	6	1	9	2	8	9	5	3	53
4–6 w	0	0	0	0	1	2	0	1	0	0	0	4
% healthy	75.9	52.8	39.6	43.1	62.5	25.6	57.1	55.6	48.2	42.3	57.8	51.8%
% sick ≥2 w	1.8	5.5	14.6	11.8	4.2	28.2	5.7	16.7	16.1	19.2	6.7	11.6%
% sick total	24.1	47.2	60.4	56.9	37.5	74.4	42.9	44.4	51.8	57.7	42.2	48.2%
BRD
0 w	43	22	32	18	18	28	21	35	21	18	10	266
1 w	10	10	12	13	18	4	11	12	16	3	19	128
2–3 w	1	3	4	15	12	6	3	7	15	5	12	83
4–6 w	0	1	0	5	0	1	0	0	4	0	4	15
% healthy	79.6	61.1	66.7	35.3	37.5	71.8	60.0	64.8	37.5	69.2	22.2	54.1%
% sick ≥2 w	5.6	11.1	8.3	39.2	25.0	17.9	8.5	13.0	33.9	19.2	35.6	19.9%
% sick total	20.4	38.9	33.3	64.7	62.5	28.2	40.0	35.2	62.5	30.8	77.8	45.9%

*Each recruited calf is counted once. Healthy animals are recorded as having 0 weeks with the disease.