This study aims to study the local conditions of extensive or semi-intensive breeding and the study of the growth of lambs and ewes from birth to the 10th, 30th and 70th days. To achieve this goal, we relied on several criteria such as age, weight, Average Daily Gain, Milk production with sex, age and breeding system factors. This study shows that the growth of lambs is dependent on the ingestion of milk in quantity and quality during the first weeks of the lambs' life. The ability of ewes with double litters to produce more milk than those with single litters has been clearly demonstrated. The breeding system and pre-partum supplementation have very important effects on milk production (quantity and quality of milk) and on the weight of lambs at birth. The study of lamb growth shows the classic results of a higher Average Daily Gain (ADG) in males than in females as well as in singles than in doubles. Whatever the type of breeding "extensive or semi intensive", at the 10th, 15th, 30th, 70th day male lambs are heavier than females and lambs from ewes that receive food supplements have a faster growth than lambs in the extensive system. Our result shows that there is a significant relationship between the start of lambs, that is to say the variation in weight during colostrum intake, and subsequent growth (ADG10-30), and between the breeding system and milk performance, and between the milk performance of ewes and the growth of lambs. In conclusion, the level of feeding is one of the breeding factors that affects milk production in dairy sheep, daily growth pre-partum and post-partum supplementation and that GMQ is higher in males than in females and in singles than in doubles