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For Brahman or Santa Gertrudis crosses (tropical breeds), a medium to high roughage diet may be adequate. For animals raised on the range from weaning to 18 months, a daily live weight gain of 0.3 kg has been reported (Animal production and range research unit 1988) and this will probably decline as the animals mature.
1 Liver fluke infection in growing cattle has been shown to depress liveweight gain by between 0.07 kg/week and 1.2 kg/week, depending on the size of the fluke burden.11.  Suggested values for milk loss due to liver fluke infection are up to 1.0 kg/day over a 305 day lactation.11.