Lactating Cows
Modern dairy cows peak at higher yields and hold these peaks for longer periods and have a more persistent lactation than more traditional type cows.
Milk Fever
http://www.vet.ed.ac.uk/dhhps/documents/MilkFeverControlPDF.pdf
Retained Afterbirths
Ketosis
Acidosis
Lameness
Energy Balance
Body Condition score
Protein
Major Minearals
Trace Elements
Vitamins