33167
document
Lactoferrin supplementation to Holstein calves during the preweaning and postweaning phases . Sixty Holstein calves ( 30 bulls , 30 heifers ) were used to examine the effects of supplemental lactoferrin on feed intake , growth , and health during the preweaning and postweaning periods . One of 3 levels of lactoferrin was supplemented from 3 to 56 d in either whole milk or water to produce 3 dietary treatments : 1 ) 0 g/d , 2 ) 0.5 g/d , and 3 ) 1 g/d . Whole milk ( 3.8 L/d ) containing lactoferrin supplements was fed from bottles until weaning at 35 d. From d 36 to 56 , lactoferrin supplements were added to water ( 15 to 25 mL ) and fed from bottles . Lactoferrin supplementation had no effect on feed intake , body weight , average daily gain , heart girth , body temperature , fecal scores , respiratory scores , or haptoglobin concentrations . Calves were housed in individual pens in either an open-sided barn or hutches . Calves raised in the barn consumed more calf starter and therefore grew better than calves raised in hutches . Under the conditions of this study , lactoferrin supplementation was not beneficial . Further research is needed to fully elucidate the role of lactoferrin , and possible benefits during different feeding conditions or milk sources .
33168
Intervention_Pharmacological
Lactoferrin supplementation
33169
Intervention_Pharmacological
supplemental lactoferrin
33170
Intervention_Pharmacological
lactoferrin
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Intervention_Pharmacological
lactoferrin supplements
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Intervention_Pharmacological
lactoferrin supplements
33173
Intervention_Pharmacological
Lactoferrin supplementation
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Intervention_Pharmacological
lactoferrin supplementation
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Intervention_Pharmacological
lactoferrin
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Outcome_Physical
feed intake , growth , and health
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Outcome_Physical
feed intake
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Outcome_Physical
body weight , average daily gain , heart girth , body temperature , fecal scores , respiratory scores , or haptoglobin concentrations
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Participant_Condition
( 30 bulls , 30 heifers )