The Lika Pramenka sheep is an indigenous Croatian breed of sheep that is mostly bred in area of Lika. It is most often bred in extensive and semi-intensive production systems. Pramenka is multi-purpose sheep breed, but for the last few decades it is most often bred for meat production (the Lika lamb meat). This study was conducted at two family farms, in total at 137 lambs from lambing to weaning, up to the average age of lambs of two months. Immediately after lambing and gender determination, the birth weight of each lamb is measured by weighing, and then the weighning was repeated on the 30th and 60th day in order to determine the body weight and calculate the average daily gain. During the entire duration of the experiment, after consuming the colostrum, lambs were fed with milk (suckling) and together with the sheep (mothers) stayed in the pasture and consumed pasture from the natural Lika meadows and pastures. The aim of the research was to determine the birth weight of Lika Pramenka lambs, the body weight on the 30th and 60th days and to determine connection between the birth weight and the gender of the lambs and litter size and influence of the breeder on the investigated indicators. The average birth weight of Lika Pramenka lambs included in the research was 3,19 kg and lambs gained on average 0,249 kg per day. Statistical analyses revealed a statistically significant impact of gender (P<0,05), litter size (P<0,05), breeder (P<0,05) and interaction between breeder and litter size (P<0,05), but other interactions were not statistically significant.