Table 2. Dairy Cow Enrollment in DHI Test Plans as of January 1, 2008
By Breed

  Ayrshire Brown Swiss Guernsey Holstein
Test plan Herds Cows Herds Cows Herds Cows Herds Cows
DHI 8 257 8 372 9 349 1,117 508,080
DHI-AP-T 2 118 3 119 3 182 711 142,595
DHI-APCS 0 0 2 144 1 17 879 472,080
DHIR 10 438 33 1,664 17 969 631 121,686
DHIR-AP-T 8 304 29 1,877 6 380 389 57,379
DHIR-APCS 2 549 4 337 3 165 167 64,037
DHIR-AP 32 1,633 87 5,078 32 1,978 1,235 152,396
DHI-AP 47 1,955 79 4,117 63 2,420 9,324 1,818,241
DHI-MO 0 0 1 171 0 0 35 19,428
DHI-MO-AP 0 0 0 0 0 0 45 18,074
Other plans 7 305 18 762 27 981 5,344 621,000
All Plans 116 5,559 264 14,641 161 7,441 19,877 3,994,996

 

 
  Jersey Milking Shorthorn Red and White Mixed
Test plan Herds Cows Herds Cows Herds Cows Herds Cows
DHI 75 17,031 0 0 0 0 68 23,361
DHI-AP-T 33 4,360 1 90 2 88 42 13,010
DHI-APCS 26 18,748 0 0 0 0 61 14,399
DHIR 122 14,601 7 441 0 0 32 3,578
DHIR-AP-T 69 14,324 3 164 1 103 27 3,280
DHIR-APCS 35 9,936 0 0 0 0 17 2,686
DHIR-AP 214 22,307 16 952 2 189 136 14,384
DHI-AP 398 78,125 8 198 16 639 736 90,810
DHI-MO 1 69 0 0 0 0 1 947
DHI-MO-AP 0 0 0 0 0 0 5 848
Other plans 137 9,775 4 431 3 137 291 32,173
All Plans 1,110 189,276 39 2,276 24 1,156 1,416 199,476 

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