Last decade changes mostly influenced on size of sheeps population. An approachable informations relating to this subject are very fragmentary. Research included also changes regarding extant, create and liquidate pedigree and reproductive flocks over 1964 to 1976 as well over 1980 to 2000. On base of different sources one tried to describe this problem at first rather homogeneous pedigree Bydgoszcz Breeding District (BBD). From 1983 population of sheeps and goats in BBD increased and was maximal in 1986, than decreased rather impetuous. Over 1980 to 1990 participation of BBD in local population didn’t change in great part and was from 5.7 to 7.2%. Whereas from the beginning of 1991 started to increase (7.3%) till 1980 (13.4%). Last year (1999), BBD participation decreased to 11.7%. At first a little differentiation of race structure, in which dominated Merinos underwent differentiation in next years (3 genotypes in 1980 and 15 in 1998). However, predominance of Merinos is very considerable (95.4% of ewes in 1980 and 81.4% in 1999 in relation to all ewes register in flock books). In this paper one inserted a list of reproductive and pedigree sheep-folds in order to use of approachable archival informations and also to description of sheep-folds, which were carried weight for sheep-breeding in region or even in Poland. Unfortunately many informations concerning years between 1977 and 1999 are missing.

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