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Effects of Fiber Addition to Corn Diets on Fatty Liver-Hemorrgahic Syndrome

Fatty liver-hemorrhagic syndrome continues to account for about 10% of the mortality among caged laying hens. Previous studies have shown that liver fat accumulation is suppressed when oats or wheat are used as part of the diet. Two experiments using oat hulls, wheat bran or cellulose as a fiber source were completed this past year. The first experiment involved a normal feeding regime, while the force-feeding technique was used in the other

Strain Effects With Low Protein Layer Diets

Previous studies at the South Dakota Experiment Station showed that average hen-day egg production over fifteen 28-day periods was reduced from 70 to 67% when the protein content of the diet was lowered from 16 to 12%. Furthermore, the combined addition of methionine and lysine depressed production to 61%. Tryptophan appeared to somewhat alleviate the depression effect caused by methionine and lysine, whereas isoleucine did not further improve hen performance

The Fatty Liver Hemorrhagic Syndrome (FLHS)

Fatty liver hemorrhaglc syndrome (FLHS) has become a major cause of mortality among caged laying hens. It was second (14%) to lymphold leukosls as the cause of death In 1974 among those hens submitted to the diagnostic laboratory from this research station. The problem seems to be Increasing with the Increased use of high energy-low protein layer diets

Responses of Two Strains to Amino Acid Additions in Low Protein Layer Diets

It is well agreed among scientists that the better the balance of amino acids in the diet of poultry, the lower the bird\u27s requirement for dietary protein. Generally, a lower protein content should result in lower cost of production and increased economic return. Studies at the South Dakota Agricultural Experiment Station showed that low protein com-soy diets for egg production are deficient in methionine, lysine arid tryptophan. A beneficial response was obtained in a recent study when the combination of isoleucine and valine was added to a 10% protein diet containing additions of methionine, lysine and tryptophan. Furthermore, a genetic influence on amino acid requirements was evident since the three strains of laying hens \u27responded differently to amino acid additions. Valine supplementation appeared to correct the amino acid imbalance resulting from the tryptophan addition for one strain and isoleucine corrected the imbalance for the other two strains

Fatty Liver Hemorrhagic Syndrome in Laying Hens

Fatty liver hemorrhagic syndrome (FLHS), a major cause of mortality among caged laying hens, was second (15%) to lymphoid leukosis in 1975 among those hens submitted to the Animal Disease Research and Diagnostic Laboratory from this research station. The disease is characterized by a 20 to 25% increase in body weight, a 25 to 30% decrease in egg production and an Increase in mortality from excessive liver fat and liver hematomas. Two more experiments on this subject have been completed. One used a normal feeding regime and the other used the force-feeding technique described in last year\u27s Poultry Day Report (A.S. Series 75-28)