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Performance and health of dairy calves fed milk replacers formulated with different levels of coconut oil as a partial replacement of animal fat in two feeding rates.

D. Ziegler

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06-22-2020

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Abstract:

M109
Performance and health of dairy calves fed milk replacers formulated with different levels of coconut oil as a partial replacement of animal fat in two feeding rates.
D. Ziegler*1, H. Chester-Jones1, B. Ziegler2, A. Manthey2, E. Dufour2. 1University of Minnesota Waseca, MN, 2Hubbard Feeds Mankato, MN.

One-hundred six (2 to 5 d old) Holstein heifer calves (39.7 � 0.63 kg) from 2 commercial dairies were randomly assigned to 1 of 5 milk replacer (MR) treatments, formulated with animal fat (AF) or a blend of coconut oil (CO) and AF (FB) to evaluate calf performance and health. The study was conducted between November 2018 and February, 2019. All calves were fed a medicated (Decoquinate at 45.4 g/ton) texturized calf starter (CS; 18% CP as fed). Water and CS were offered free choice from d 1 to 56. All MR were formulated with all-milk protein and Bio-Mos. All calves were supplemented (d 1 to 14) with neomycin sulfate and oxytetracycline at 22 mg/kg BW/d. Treatments were as follows: 1) 24% CP:20% Fat MR, (AF) fed at 0.28 kg in 2.00 L of water 2� daily from d 1 to 35 and 1� daily from d 36 to weaning at d 42 (AFL); 2) 24% CP:24% Fat MR formulated with a FB of 85% AF,15% CO; fed as in TRT 1, (LCOL); 3) 24% CP:24% Fat MR formulated with a FB of 75% AF, 25% CO fed as in TRT 1, (HCOL); 4) MR as in TRT 2, fed at 0.43 kg in 2.98 L of water 2� daily from d 1 to 42 and 1� daily from d 43 to weaning at d 49, (LCOH); 5) MR as in TRT 3, fed as in TRT 4; (HCOH). Data were analyzed using the PROC mixed procedure of SAS and repeated measures analyses applied where appropriate. There were no differences in ADG (P > 0.05) d 1 to 56, d 57 to 84 or d 1 to 84 averaging 0.79, 0.90 and 0.83 kg/d, respectively. Hip height gain d 1 to 56 was greater (P < 0.05) for high compared with low MR feeding rates averaging 13.10 and 11.75 cm, respectively. Total (d 1 to 56) CS intake, DMI and gain:feed ratio was higher (P < 0.05) for AFL, LCOL and HCOL compared with LCOH and HCOH averaging 56.8, 77.9 kg, 0.58 and 34.8, 71.8, 0.65 respectively. There were no differences in health costs or scouring days (1 to 4; where 1 = normal, 4 = watery), d 1 to 56 averaging 50 cents and 1.82 d, respectively. Under conditions of this study there was no difference in performance or calf health when feeding a 24% CP:24% Fat MR formulated with 2 different levels of CO.

Keywords: calf performance, milk replacer, animal fat.