ABDULWAHAB, A., HORNIAKOVÁ, E.: Some parameters of meat and bone chemical content of broilers fed diets containing Lactobacillus species based on dried yogurt. Acta univ. agric. et silvic. Mendel. Brun., 2010, LVIII, No. 2, pp. 13-18 The eff ect of dried yogurt (Kashik) based on Lactobacillus plantarum and Lactobacillus acidophilus on broiler meat crude protein and fat content and tibial bone mineral composition was studied. The birds were fed diets including probiotics only during the fi rst 21 days of age. The trial groups T1, T2 and T3 were supplied with 1, 3 and 5 % Yoghurt, respectively. The control group was fed with a commercial feed mixture. Breast muscules nutrition quality was not signifi cantly aff ected (P > 0.05) with Kashik up to day 21. The highest diff erence was 0.25% (C and T3) in crude protein content and 0.15% in crude fat (C and T2). Also, leg muscles crude protein and fat percentages were not aff ected by probiotics up to day 21 of age. The values varied from 18.76 to 19.24% and from 5.77 to 6.54% respectively. However, signifi cant diff erences (P < 0.05) in legs' muscles crude protein (19.05 and 19.92% in C and TI group) and fat contents (4.82 and 6.33%) were observed between the T1 and T3 group up to 40 days of age. No signifi cant eff ects of probiotics were observed on breast muscles mineral content up to 21 days and 40 days of age. Leg muscles mineral contents were not aff ected with probiotics up to 21 days, whereas up to 40 days only leg muscles P and Mg content was aff ected (1.80 and 1.61 g . kg −1 of P in C and T3 group and 0,42 and 0,44 g . kg -1 in C and T1, in Mg, resp.). There were no signifi cant eff ects of treatments on tibial bone Ca and Mg contents up to day 21. However, tibial bone P content was signifi cantly aff ected. The addition of 3 and 5 percents of Kashik increased tibial bone P content significantly (98.5g . kg −1 in T2, 97.0g . kg −1 in T3) above the value of the control group (80.5g . kg −1 ) up to 21 days of age. There were no signifi cant diff erences between treatment groups and the control group in tibial bone P and Mg composition at day 40 of age. The values varied from 86.00 to 93.12% in C and T1 in P and 4.10 to 4.23g . kg −1 in Mg content. Some signifi cant diff erences were observed between the treatment group which was supplemented with 1% of Kashik and the control group in tibial bone Ca composition at day 40 of age (213.62 and 229.06g . kg −1