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Abstract
Many recent papers have referred to the literature bearing upon certain aspects, but no one heretofore has reviewed all phases of ruminal physiology and pathology relating to the bloat problem. For the purposes of acquainting workers with all phases of the problem and revealing the gaps in our present knowledge, such a review would seem desirable and is being attempted in the present article.
Cattle, sheep, goats, and probably all other ruminants are subject to bloat. To our knowledge no one has attempted to determine experimentally the relative susceptibility of different species to this condition. From a survey in Scotland, McCandlish (121) obtained evidence that dairy cows were more susceptible than beef animals or sheep. Mead, Cole and Regan (125) noted that the feeding of green alfalfa tops caused less serious bloat in sheep than in dairy cows. Since, however, they compared only four cows and four sheep, the difference could easily be explained on the basis of individual susceptibility rather than upon a species difference.
1 Fourth Report of the Committee on Animal Health of the National Research Council. Sponsored by a Subcommittee on the Prevention of Bloat consisting of H. H. Cole, Chairman, R. S. Amadon, R. W. Dougherty, C. F. Huffman, T. M. Olson and A. F. Schalk.
2 Division of Animal Husbandry, University of California, Davis.
3 Department of Dairy Husbandry, Michigan State College, East Lansing.
4 Deceased; late of the Department of Dairy Husbandry, South Dakota State College, Brookings.
5 College of Veterinary Medicine, Ohio State University, Columbus.
6 Fourth Report of the Committee on Animal Health of the National Research Council. Sponsored by a Subcommittee on the Prevention of Bloat consisting of H. H. Cole, Chairman, R. S. Amadon, R. W. Dougherty, C. F. Huffman, T. M. Olson and A. F. Schalk.
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