Scholarly Journal of Agricultural Science Vol. 11(4), pp. 51- 61 November, 2021 Available online at http:// www.scholarly-journals.com/SJAS ISSN 2276-7118 © 2021 Scholarly-Journals Full Length Research Paper Perfomance of Finisher Broiler Chickens Fed Varying Levels of Garlic (Allium sativum) Powder in Sokoto, Nigeria Abdullahi, A.U. *1 and Yakubu, D. 2 1, 2 Department of Animal Science, Faculty of Agriculture, Usmanu Danfodiyo University, Sokoto. Received: 4 October, 2021, Accepted: 14 November, 2021, Published: 25 November, 2021 This study was conducted at the Teaching and Research Farm of the Department of Animal Science, Faculty of Agriculture, Usmanu Danfodiyo University, Sokoto to evaluate growth performance of broiler chickens fed graded levels of garlic (Allium sativum) in their diets. Using Completely Randomised (CRD) set-up, a total of 200 marshal strain of broiler chicks were randomly divided in to (4) treatment group of 50 birds each. Each group was divided in to 5 replicate of ten birds each. Oregano powder was added over the top at 150, 300, 600 in Treatments 1, 2 and 3 respectively while 0g was used in Treatment 4 which served as the control. Standard management procedures were observed throughout the experiment. Performance parameters monitored include feed intake, body weight, bodyweight gain, feed conversion ratio and mortality. The experiment lasted for 49 days. Results on performance in the finisher phase showed that all feed intake parameters recorded significant difference (p<0.05) and showed a fluctuating trend with increase in Garlic powder in the treatments. FI was lowest in T3 (485.24) and (69.32). Bodyweight parameters recorded nonsignificant difference (p>0.05) in this experiment but were better (836.78) in T4 (0g Garlic). Body weight gain performance was significant (p<0.05) only in BWGB and being better in T3 (600g Garlic). FCR performance was not significant (p>0.05) between the treatments but was also better (1.19) in T3 (600g Garlic). Mortality was observed to be higher than the 10% acceptable highest mortality rate in T1 and T4. However, high mortality recorded in in T1 and T4 were probably due to heat stress at the period of the experiment. Based on the results, it is recommended that garlic can be included in broiler diets at 600g/100kg diet for better performance. Keywords: Broiler birds, Growth performance, carcass characteristics, level of garlic inclusion. INTRODUCTION Agriculture remains the pillar of Nigerian economy for growth, development, poverty alleviation, contribution to Gross Domestic Product (GDP), employment and income generation (Philip et al., 2009). Poultry farming is the raising of domesticated birds such as chickens, ducks, turkeys, geese etc. for the purpose of farming meat or eggs for food, Poultry are raised in great numbers, with *Corresponding author’s e-mail: aauamin@gmail.com chickens being the numerous and predominant (Deeb and Amam, 2002), Poultry production has been recognized as an important enterprise in economies of developing countries. Its role in improving the nutritional status and income of many small farmers and landless communities has been recognized by various scholars and rural development agencies; (Bambrige, 1988, FAO, 2006). The poultry industry has assumed greater importance in providing employment opportunities and animal food production in Nigeria (Mbansor, 2002). A broiler chicken is any chicken (Gallus gallus domesticus)