Studies were conducted at Suffolk flock sheep located in the Podlasie area. The studies were carried reach over 1988 to 2002. The aim of this project was to compare the differences between the breed Suffolk imported com G. Britain and sheep brith, rearing and performance in Podlasie. Estimate the long the coefficients of relationship (0.015-0.078) which means that the purchased animals were not related. Fertility higher of ewes in the final year by about 29.3% from average country. The highest dailly gain was obtained lambs in period 2 to 56 days of age. The body weight in 100 days of age generally exceeded 30 kg irrespecive of sex. Average wool production in the population was the lowest in the country of analysis.

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