In Hungary more than half of the entire livestock is kept in industrial breeding plants i.e. under mass breeding conditions. So long as the industrial capacity of the plants remains insufficient to process the volume of carcasses, the animal breeding plants are compelled to find their own solutions for the disposal and/or rendering of the carcasses and waste. On some state farms the carcasses are processed into so-called meat-mash which must be utilised as fodder within 48 hours after the death of the animal. High-quality meat-meal can only be obtained from fresh carcasses. Carcasses are processed for reasons of economy, but the methods of carcass disposal are subject to stringent requirements imposed by the public health service, veterinary hygiene inspectorates and by the environment protection authorities. The carcasses or slaughter-house waste destined for processing must not contain any pathogens likely to be injurious to man or animal or to threaten the health of the persons concerned with the carcass processing. For this reason the carcasses must be kept in boilers for 2 to 4 hours at a pressure of 4 atü. The formulation of the factory rules and the technology of processing must make due allowance for these stipulations.