lt was reported that half or completely replacing the fi5hmeal of fattening pigs’feedstuff with leather protein meal made no significant effects on their growth rate,but con-sidering their growth coeffeciency, 50%of the substitution was better. Further more,the re-sults of anatomical determination of the tested pigs and the results of analying the physiologi-cal and biochemical index of their blood showed that 3%of the substitution in the dailh feedwould neither cause abnormality of pigs health and meat ...