This study aims to investigate the effects of orally administered graded doses hydro-methanol stem extract from Anacardium occidentale (MSEAO) on haematology and serum biochemistry chickens. Forty, 8-weeks old cockerel chickens were randomly assigned into four groups (groups 1, 2, 3 4) ten birds each. Groups 2 received 3000, 1500 500 mg/kg body weight MSEAO, respectively, while in control group...