Effect of some maternal and environmental factors and of the factors related with the litter on the
birth weight and growth of veratos kids raised under semiextensive regime
The weights of 413 kids of Verata breed at birth, 45 and 70 days of age were controlled, The kids were
born from October to Frebuary along four consecutive years in a free-range farm located in Extremadura
(Spain). The birth weight and the average daily gain were higher (P<0.05) in the male than in female
kids and in the kids from single kidding than those from double kidding. The goat age and kidding
season had no significant effects on birth weight and average daily gain. The year had a significant
influence (P<0.05) on average daily gain but no significant effect on birth weight. The increase of goat
milk production improved the average daily gain of the kids during the period from birth to 45 days of
age. The kids average daily gain decreased, during the 45 – 70 days period compared to birth – 45 days
period (142 vs 120 g) due to the reduction of the goat milk production during 45 – 70 days phase. The
kids birth weight had a significant (P<0.01) effect on the kids growth. As the birth weight increased the
average daily gain also increased. The interaction between the average daily growth and birth weight
for the variables kid sex and kidding type were studied in this experiment.
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