Investigations were carried out on the composition and some properties of the manure bedding from poultry-dressing combines as well as of the complete ration offered together with some beding. High variability of the indices was established so far as the nutrient value and the contamination with occasionally pathogenic bacteria (coli, proteus, and others) and moulds were concerned. No obligatorily pathogenic bacteria and mycotoxins were established. The reasons for illness and culling of lambs fattened with such feed were shown to be associated with the status of the urinary system in the first place. The presence of fungi and bacteria in meals of deep bedding from poultry houses and the occasional presence of chemical compounds in the meat of the fattened animals have made necessary further profound studies aimed at completely elucidating their effect on the health of ruminant animals and the quality of the meat obtained.