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The aim of this study is to examine the effects of different levels of the feed supplement Saccharomyces cerevisiae, a yeast metabolite, on broilertibiotarsus traits and to reduce leg problems by identifying thepathological changes in leg skeletal system. Thus, reducing leg disordersdue to the skeletal system, the cause of significant economic losses in ourcountry (Turkey), was investigated by the supplementation of Saccharomyces cerevisiae in broiler feed. In the study, 300 male day-old, Ross 308 broiler chicks were used.Experiment groups were designed as follows: control; 0.1 % Saccharomyces cerevisiae; 0.2 % Saccharomyces cerevisiae; 0.4 % Saccharomyces cerevisiae. The experimental diets were chemically analyzed according to themethods of the Association of Official Analytical Chemists. Twelve groupswere obtained, including three replicates for each experimental group. Eachreplicated group was comprised of 25 chicks, and thus 75 chicks were placedin each experimental group. After 42 days, broiler chickens wereslaughtered. Tibiotarsi were weighed with a digital scale, and the lengthswere measured with a digital caliper after the drying process. Cortical areaswere measured with the ImageJ Image Processing and Analysis Program. A UTESTModel-7014 tension and compression machine and a Maxtestsoftware were used to determine the bone strength of the tibiotarsus. Theseverity of the tibial dyschondroplasia lesion was evaluated as 0, +1,+2 and +3. Crude ash, calcium and phosphorus analyses were performed todetermine the inorganic matter of tibiotarsi. For radiographic evaluationsof epiphyseal growth plates, tibiotarsi from the right legs were photographed in lateral and craniocaudal positions and examined. Statistical analyseswere performed with the SPSS statistics program. It was observed that the use of Saccharomyces cerevisiae as a feed supplement led to an increase in the bone traits of broiler chickens. Optimum results for bone mineral content, biomechanical traits and strength were provided by the addition of 0.2 % Saccharomyces cerevisiae in broiler feed. As a result, the use of yeast as feed supplements in broilers is considered tobe an economic and convenient way of providing animal welfare and preventing commercial losses due to leg problems

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The effects of &amp;lt;i&amp;gt;Saccharomyces cerevisiae&amp;lt;/i&amp;gt; on the morphological and biomechanical characteristics of the tibiotarsus in broiler chickens