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
A Manual for Use of BESTPRED: A Program for Estimation of Lactation Yield and Persistency Using Best Prediction