5.1.2 breedUNK

breedUNK specifies the breed to be used when an unknown breed code is found in a cow ID, which may be of particular use to anyone analyzing data from crossbred cows. Breeds are as follows: 1=AY, 2=BS, 3=GU, 4=HO, 5=JE, 6=MS. The default is 4 (Holstein).
breedUNK = 4

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