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Studies have been conducted with young turkey poults to determine the effectiveness of several commercial nutrient preparations for stimulating early growth and reducing poult mortality. A single oral dosage of a complete nutrient solution (Ambex) was effective, especially when poults were held for 12 hours before starting. The addition of several commercial “stress packs” or water soluble zinc bacitracin to the drinking water of poults for the first 14 days was also effective, especially if the commercial preparations contained soluble antibiotics.

SEVERAL by-product protein supplements have been demonstrated to be of value in poultry diets, such as feather meal, poultry by-product meal and more recently cattle and hog hair meal (Moran et al., 1966Moran et al., 1967 a,b; Moran and Summers, 1968 a,b). Hydrolyzed leather meal, a feedstuff produced from tanned leather scraps, offers the possibility of being used to supply part of the protein needs of the chick. This material has been approved for use as a source of protein in swine feeds at levels not to exceed 1% of the diet (Anonymous, 1967). Little experimental data has been reported regarding the feeding value of such a product in chick diets. Wisman and Engel (1961) reported that a tannery by-product meal could be used to replace up to one fourth of the protein supplied by soybean meal in a broiler diet. However, the product used in this report consisted of flesh scrapings…

YEASTS have been used by man for centuries, primarily in the production of alcoholic drinks and making bread. The use of yeasts grown on carbohydrate substrates as an ingredient in the diet of man or animals dates from before the beginning of this century (Llewelyn, 1967). One of the most recent applications of yeast culture for food materials has been the development of yeast cultures which can utilize hydrocarbon fractions as a substrate. Over 100 bacteria, yeast, actinomycetes and fungi are known to grow at the expense of hydrocarbons (Foster, 1962). The utilization of gaseous hydrocarbons by soil microorganisms has been studied as a means of detecting petroleum gas emanations in prospective areas (Davies, 1956). Mixed cultures of yeast have been grown on gas oil (Miller and Johnson, 1966a) and n-paraffins (Miller and Johnson, 1966b). Generation times of 3 to 8 hours with cell yields of 70–90% of substrate…

IN STUDIES conducted to determine the origin of the chick growth stimulating factor, Russo et al. (1960) compared the use of fermented and unfermented corn fermentation solubles and steeped vs. whole corn. Their findings indicated that the origin of the chick growth stimulating component was in the corn grain itself and not due to the fermentation process. Experiments were conducted at this laboratory to evaluate the nutritive value of the DSLC blended product in broiler diets and to determine if it contained any possible unidentified growth factor activity. Dried steep liquor concentrate (DSLC) is a blended feed product of fractions obtained from the wet milling of corn. It contains corn germ meal, corn bran, corn gluten meal, and dried condensed fermented corn extractives, all of which have been previously used in poultry feeds in the past, either separately or in various blends. A typical analysis of the product is shown…