The consumers of nowadays market can find various products of pork, but in accordance with a higher step of living standards and a lower one of the physical work concerning to human habitual changes, the EU and world market go to the demand for muscle pork. Due to the new price regulation of May 2002, every specialized enterprise has to run the accountance for meat accordingly to new valuation of prices, where the main criteria are as follows: carcass mass, muscularity (quantity of red meat) and thickness of bacon. The muscle-meat with thin slices of bacon is becoming even the higher rating. Therefore the meat corporations have to breed the more muscled fattened-pigs. The mass-production of pork have to run this obligation through a large complex of measures: best of fattening food, optimal micro-climat condition in piggery, consequent use of breeding methods as well as a systematic promoted selection. The aim of work is both to compare some carcass of quality measures of fattened-pigs in agricultural companies and corporate complexes (in connection with carcass weight/kg, bacon thickness/mm, muscularity/% (FOM), muscularity class) and to compare the average measures of carcass of fattened pigs in Lithuania with the average measures of carcass of fattened-pigs in Poland. Research results. The research was completed in 7 agricultural companies “A”, “B”, “C”, “D”, “E”, “F”, “G”, as well as in the corporate complexes: “H”, “I”, “J”, “K”, “L”, “M”, “N”. There were gathered... [to full text]