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Goats eat 3-4% of body weight as dry matter, proportionally more than cattle because of their smaller size and faster metabolism. Splitting the ration into concentrate and roughage and converting the roughage back to green fodder at about 25% dry matter gives the daily cut-and-carry quantity.
Goat ration
DM per goat = body weight x DMI %; herd DM = per goat x number
Green fodder
Green fodder = roughage DM / 0.25 (fresh basis)
Maintenance on good browse needs none. Concentrate is justified for late pregnancy, lactation and finishing kids, typically 200-400 g a day.
They are selective browsers and reject trampled or soiled feed. Raised feeders and small frequent offerings cut waste from 30-40% down to under 10%.