Т. Popova*, E. Petkov, M. Ignatova Institute of Animal Science, 2232 Kostinbrod, Bulgaria (Manuscript received 16 May 2015; accepted for publication 8 June 2016) Abstract. An experiment with two lines of chickens – synthetic line La Belle and White Plymouth Rock was carried out in the

D. Panayotov, T. Iliev, N. Naydenova, D. Pamukova, M. Simeonov Abstract. The aim of the study was to investigate somatic cell count and milk composition from Pleven Black head breed of sheep. A total of 96 ewes on first lactation were used belonging to the flock of the village of Koma