MATERIALS AND METHODS
The experiment was conducted during the breeding season (October to February), at the Zanjan University farm located in Zanjan city. One hundred sixty two cycling, multiparous fat-tailed Iranian Afshari ewes, weighing 52-80±2.5 kg and aging 2-8 years old were used in the trial. All Animals were provided with water and manually fed alfalfa hay, supplemented with grain pellets and ad libitum. One to two weeks before ram induction, ewes' BCSs were determined and weighing performed.