Contributions to variability of clinical measures for use as indicators of udder health status in a clinical protocol

Table 1 Key characteristics of the 16 participating dairy herds, December 2000.

Herd ID:	Breed distribution %	No. Cows per year	Type of housing	Summer grazing	% cows 1. lact	% cows 2. lact	% cows ≥ 3. lact	Calvings per year	Cullings per 100 cow years
1	87¹	51	Tied	Yes	28.8	36.5	34.6	61	35
2	100¹	56	Tied	Yes	31.3	33.7	34.9	50	53
3	100¹	66	Loose	Yes	45.6	25.3	29.1	66	44
4	98¹	74	Tied	Yes	30.5	34.5	34.8	60	32
5	99³	72	Tied	Yes	28.8	35.6	35.4	88	33
6	100¹	74	Tied	Yes	30.9	33.5	35.4	86	31
7	67¹	95	Loose	No	28.3	33.3	38.3	107	36
8	100¹	113	Tied	No	29.1	36.1	34.6	139	43
9	98¹	102	Loose	Yes	32.2	35.0	32.7	133	52
10	97¹	70	Tied	No	27.7	33.0	39.2	90	46
11	98¹	57	Tied	Yes	31.6	32.9	35.3	58	42
12	99¹	190	Loose	Yes	29.6	34.0	36.3	201	28
13	100¹	63	Tied	Yes	28.9	34.0	37.0	72	29
14	100²	51	Tied	Yes	29.5	33.1	37.3	62	57
15	98¹	131	Loose	Yes	28.9	33.8	37.2	139	45
16	100¹	119	Loose	Yes	29.1	34.8	36.0	123	41

1 = Danish Holstein Friesian Breed, 2 = Red Danish Dairy Breed, 3 = Jersey Breed

ISSN: 1751-0147