The Lika Pramenka sheep is an indigenous Croatian breed of sheep that is bred in Lika and Gorski Kotar. It is adapted to the climate of the Lika region, which is characterized by cold and snowy winters and dry and hot summers. It is dominantly reared in extensive and semi-intensive production systems. It belongs to the category of multi-purpose sheep breeds, but it is primarily reared for meat production, the Lika lamb meat which is traditionally consumed in Lika, but due to its’ good reputation among consumers, it is also popular in the other parts of Croatia. This study was conducted at homestead Kučan, in the flock that counts 769 sheep in total, all reared for purpose of lamb meat production. All experimental lambs, in addition to mothers’ milk, only grazed on karst pastures with no other nutritional supplements. The research was conducted on 60 lambs of equal frequency of males and females. The selected lambs were weighed on the 0th, 30th, 60th and 90th day after parturition. The research was conducted with the aim of determining the influence of birth weight, gender and litter size on average daily gain of lambs. The lamb weighed 4.18 kg on average, and gained ~6 kg per month, or 0.2 kg per day. The inferential statistical analysis revealed a statistically significant impact of gender (P<0.01) and litter size (P<0.001) on birth weight. The impact of gender was not significant on average daily gains in any of the examined periods, while the impact of litter size was statistically significant in the first two months (P0_30<0.05, P30_60<0.01), and consequently, in the total observed period (P0_90<0.05)