[Effects of some feed connected factors on the water balance of minks]
1985
Neil, M.
Effects of some commercial dry diets - fed dry or soaked, of addition of some water absorbants in wet feed, of severe or gentle drying of wet feed and of extruded or cooked cereals in the diet, on the water balance have been studied in comparative experiments with mink. Water consumption by feed and drinking-water, water output in urine and faeces, and urine osmolality were investigated. Soaking of the dry diets tended to increase water consumption and decrease urine osmolality. Feeding the severely dried diet resulted in diarrhoea and compared with feeding the fresh or gently dried diets almost doubled the amount of faecal water. When comparing cooked or extruded cereals in the feed, no differences were observed in water intake or faecal water output. The total and urinary water output was slightly decreased in the group fed cooked cereals, probably due to the somewhat lower feed consumption in this group. Water consumption and faecal water output increased, and there was at least a tendency for increased urinary concentration, when water absorbants were added to the diet. The water bound to absorbants added is unavailable to mink. The absorbants used were considered indigestible
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