Abstract   

    This experiment was conducted to study 'effect of Biovet (E.M. Technology) on biochemical and haematological parameters of four genetically 'different strains of laying hens including cross, Desj, Fayoumi and Nick Chick. A total of 60 laying hens were involved in the trial giving 15 birds under each strain. Prior to administration of Biovet (2 ml/litre} birds were maintained in,controlled environment for 2 weeks, five blood samples were taken from each strain, and analysed for bichemical and haematological parameters, The same birds were then administered Biovet in drinking water and after 2 weeks of treatment, five blood samples from each strain of chickens were collected and teste4:as was done before treatment. Serum glucose was markedly (P<0.05) increased due to treatment and there was also significant (P<0.05) inter strain variation. Serum protein levels were only affected (P<0.05) due to treatment but there was no inter strain variation, Serum albumin and cholesterol were not affected by treatment, The haematological parameters such as Hb, WBC, Eosinophils, Lymphocytes,PCV , MCH, MCHC; and Heterophils were not affected. by treatment. There was significant (P<0.05) difference in RBCs concentration in serum which also; caused an -increase (P<0.05) in MCV values. The Biovet supplementation presumably stimulated haemopoietic system to improve performance of birds.