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To identify some genetic specificities of goat meat production in southern Tunisia, 16 years data monitoring of 1687 kids’ growth were analysed. Data distribution was studied to establish the performances regrouping pattern toward oasian breeding conditions depending on the kid’s age. The average kid’s weight was 3.11 and 13.14 kg, respectively at birth and at 90 days age. The standard deviation of those phenotypic varied largely between 0.78 and 3.25 kg, respectively at birth and at 3 months age. Thus, caprine data variation changes in relation to the phenotype. Environmental harsh conditions prevent the complete expression of the better animal genotypes.