Feed conversion is not only the relationship between the amount of food eaten and weight gain but also the full absorption of nutrients. Hence, in addition to the quality of the food provided it is important to ensure healthy, proper handling and environmental conditions.

            Antibiotics have been used as growth boosters in terms of controlling possible infections that decrease feed conversion rates. However, their indiscriminate use leads to countless problems, which include microbial resistance and their accumulation in products of animal origin. Some of the alternatives to the use of antibiotics are prebiotic additives and products made from essential oils and herbal extracts.