Effects of Aqueous Spirulina Extract Supplementation on Productive, Physiological and Biochemical Parameters in Awassi Lambs

Background: Spirulina is widely used as a dietary additive due to its rich nutrient profile, safety and associated health benefits. Its potential to influence growth performance and physiological health in livestock, particularly lambs. Methods: This study involved forty Awassi lambs aged 3-4 months with an average body weight of 20.36±0.40 kg BW. The lambs were randomly divided into four groups of ten. The control group (T1) received a standard diet without Spirulina extract, while the experimental groups (T2, T3, T4) were fed the same diet supplemented with aqueous extract of Spirulina at concentrations of 1%, 2% and 3%, respectively, administered via oral gavage daily for 12 weeks. Result: Supplementation with Spirulina aqueous extract significantly enhanced feed intake, weight gain and feed conversion efficiency. Blood parameters improved, showing increased hemoglobin levels, red blood cell counts, packed cell volume, total blood protein, serum albumin and globulin levels compared to the control Urea levels decreased with higher Spirulina doses and liver enzyme levels (ALT and AST) declined as the dosage increased. The findings suggest that Spirulina supplementation positively influences growth performance and blood health in awassi lambs, indicating its potential as a natural supplement to improve sheep health and productivity.