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  • Title: Effects of high dietary levels of soybean meal and its constituents (potassium, oligosaccharides) on foot pad dermatitis in growing turkeys housed on dry and wet litter.
    Author: Youssef IM, Beineke A, Rohn K, Kamphues J.
    Journal: Arch Anim Nutr; 2011 Apr; 65(2):148-62. PubMed ID: 21545080.
    Abstract:
    Soybean meal (SBM) is the main protein source in diets for turkeys. High dietary levels of SBM are thought to increase the incidence of foot pad dermatitis (FPD). Therefore, this study was conducted to test potential effects of high SBM and to elucidate which constituents in SBM might be associated with the development of FPD. Two week-old female turkeys were allotted to four groups of 29 birds each, and housed on dry wood shavings in floor pens over a period of three weeks. Four different diets were fed: control, high SBM, high potassium (K) or high oligosaccharide (OL) diet. Additionally, for only 8 h/d half of the animals in each group were exposed to wet litter (27% DM) in adjacent separate boxes. The foot pads of all birds were assessed on days 0, 7, 14 and 21 for external lesions. For the histopathology of the foot pads, on day 0 three birds from each group, and on days 7 and 14 six birds per feeding group were selected. The remaining birds in each group were sacrificed on day 21 and their pads were evaluated histologically. High dietary levels of SBM, potassium or oligosaccharides did not influence the severity of FPD on dry litter, but slightly increased the severity on wet litter. However, there were no histopathological differences in FPD severity between these dietary treatments within each litter form compared to the control. Nevertheless, the FPD severity was in general higher on wet litter. Thus, litter moisture appears to be one of the most important factors involved in FPD in turkeys. In addition, all nutritional factors which increase water intake and excreta or litter moisture may contribute to an increased development and severity of FPD in turkeys.
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