This experiment was conducted to evaluate heamatology and serum biochemical indices of West African Dwarf (WAD) sheep fed Panicum maximum (PM) supplemented with varying levels of Gmelina arborea leaves (GAL). Twenty-four (24) WAD sheep was allotted to six (6) dietary treatments in a Completely Randomized Design (CRD). The diets are; (A: 100%PM, B: 75% PM+25% GAL, C: 50% PM+50% GAL, D: 25%PM+75% GAL and E: 100% Wilted GAL and F:100%GAL) and replicated four times. The experiments lasted for a period of 105 days during which the feed intake and weight gain were taken. At the end of the feeding trial, blood samples were collected from the animals using standard procedure. All data collected was subjected to one-way analysis of variance (ANOVA) using SAS (2000). There was no significant different (P>0.05) in Packed cell volume (PCV), red blood cell (RBC), white blood cell (WBC), haemoglobin (HGB),mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC). The total protein, serum urea, alkaline phosphatase, creatinine, globulin, and serum glucose of the WAD sheep fed the experimental diets was significantly (P<0.05) different among the treatments means while mean serum albumin, aspartate aminotransferase and alanine aminotransferase of the animals assessed were not significantly affected (P>0.05). Thus, feeding of G. arborea had no adverse effects on heamatology and serum biochemical profile of WAD sheep.

Key words: Haematological, Biochemical, Blood profile, Gmelina arborea ,WAD sheep.