Evaluating method of ketosis in postpartum dairy cows

An evaluating method comprising:

• (A) evaluating a state of ketosis in a dairy cow after parturition by causing a control unit to execute evaluating a state of ketosis using T-Bil and at least one value of concentration values of Ala, Arg, Asn, Asp, BCAA, Cit, Cys, Glu, Gln, Gly, His, Ile, Leu, Lys, Met, Orn, Phe, Pro, Ser, Tau, Thr, Trp, Tyr, and Val and concentration values of ALB, ALT, AST, BHBA, BUN, Ca, gGTP, Glc, NEFA, TCHO, TG, and TP in blood of the dairy cow, wherein said values are obtained for said cow before the parturition, the evaluating (A) does not use a concentration value of 3MeHis, said evaluating (A) comprises
• (i) evaluating by the control unit a value of a linear expression having the following explanatory variables:
• (a) a first explanatory value substituted with a concentration value of T-Bil in the cow;
• (b) a second explanatory value substituted with a concentration value of at least one Ala, Arg, Asn, Asp, BCAA, Cit, Cys, Glu, Gln, Gly, His, Ile, Leu, Lys, Met, 3, Orn, Phe, Pro, Ser, Tau, Thr, Trp, Tyr, and Val in the cow and (c) a third explanatory value substituted with a concentration value of at least one of ALB, ALT, AST, BHBA, BUN, Ca, gGTP, Glc, NEFA, TCHO, TG, and TP in the cow;
• (ii) determining that the cow belongs a healthy group (BHBA<1200 μmol/l) or a ketosis group (BHBA≥1200 μmol/1) based on the evaluated value of the linear expression, and
• (B) administering a prophylactic nutritional intervention before the parturition to the cow determined to belong to the ketosis group.