Sixty (60) day old chicks were used in an experiment with the aim to access the haematology and serum biochemistry of finisher broilers on Moringa oleifera and Azadirachta indica leaf extracts. The experiment consisted of four treatments in a Completely Randomized Design (CRD) of five birds per replicate. The treatments were T1 (control), T2 (40mL of moringa leaf extract), T3 (40mL of neem leaf extract) and T4 (20mL of moringa leaf extract + 20mL of neem leaf extract) per litre of water. After eight weeks of feeding, blood samples were collected for laboratory analysis. Results showed significant differences (P < 0.05) in all haematological parameters except MCH and MCV. T4 recorded the highest values in packed cell volume (31.33%), haemoglobin (13.00g/dL), red blood cells (3.68 × 10^6/mm³) and white blood cells (23.72 × 10^3/mm³). Serum biochemical parameters (urea, AST, ALT) showed no significant difference (P > 0.05). Birds on T4 showed higher (P < 0.05) total protein, albumin, and globulin. Cholesterol levels decreased significantly (P < 0.05) in treated groups. It is concluded that combining moringa and neem extracts (20mL + 20mL) can be safely added to drinking water without adverse effects.