Evaluation of the Effect of Feed Additives on Growth Performance and Feed Conversion Ratio in Broiler Chickens

CHAPTER ONE

1.1 Background to the Study

Poultry production plays a vital role in global food supply and economic development, providing affordable animal protein in the form of meat and eggs. In Nigeria, the broiler industry has expanded rapidly, but productivity is still limited by factors such as feed cost, poor nutrition, and disease challenges (Afolayan et al., 2020). To improve feed efficiency and growth rate, poultry nutritionists have increasingly turned to feed additives — substances added in small quantities to enhance feed quality, nutrient utilization, and bird performance.

Feed additives include probiotics, enzymes, antibiotics, vitamins, minerals, and organic acids. Each plays a specific role in promoting gut health, improving digestion, and boosting the immune system (Ajayi and Ojediran, 2021). For example, probiotics help maintain healthy intestinal microflora, while enzymes increase nutrient absorption and reduce feed wastage. These improvements translate into better feed conversion ratios (FCR) and faster weight gain in broilers.

However, the use of synthetic additives, especially antibiotics, has raised public health concerns due to the emergence of antibiotic-resistant bacteria. This challenge has encouraged research into natural additives such as herbal extracts and probiotics, which can serve as safer alternatives. Therefore, evaluating the effect of feed additives on broiler performance is crucial for developing sustainable and efficient poultry production systems.

1.2 Statement of the Problem

Feed costs account for over 70% of total production expenses in poultry farming, and inefficient feed utilization often leads to economic losses. Although feed additives have shown promise in improving performance, their effects vary depending on dosage, bird age, and diet composition. In Nigeria, there is limited empirical data on the comparative effectiveness of different additives under local conditions. This study therefore seeks to evaluate the effect of selected feed additives on growth performance and feed conversion ratio in broiler chickens.

1.3 Objectives of the Study

The main objective of this study is to evaluate the effects of feed additives on growth performance and feed conversion ratio in broiler chickens.
Specific objectives are to:

1. Assess the impact of feed additives on body weight gain of broilers.

2. Determine the effect of feed additives on feed intake and efficiency.

3. Compare the performance of broilers fed diets with different additive types.

4. Recommend suitable additives for improved productivity.

1.4 Research Questions

1. How do feed additives affect broiler growth performance?

2. What is the influence of feed additives on feed conversion efficiency?

3. Which additive produces the best results in broiler diets?

4. How can feed additives improve overall broiler profitability?

1.5 Significance of the Study

The findings will benefit poultry farmers, feed manufacturers, and researchers. Farmers will gain insights into cost-effective feed formulations, while feed producers will understand how to balance additive inclusion for optimal results. Additionally, the study contributes to existing literature on sustainable poultry nutrition.

1.6 Scope of the Study

The study focuses on the use of feed additives in broiler diets. It covers the measurement of growth rate, feed intake, and feed conversion efficiency under controlled experimental conditions.