給餌方法ならびに食餌中蛋白質含量がネコの排尿頻度および尿pHの日内変動に及ぼす影響

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  • Effects of Feeding Pattern and Protein Content of Dry Diets on Urination Frequency and Urine pH in Adult Cats
  • キュウジ ホウホウ ナラビニ ショクジ チュウ タンパクシツ ガンリョウ ガ ネコ ノ ハイニョウ ヒンド オヨビ ニョウ pH ノ ニチナイ ヘンドウ ニ オヨボス エイキョウ

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Two experiments were carried out using healthy cats to examine the effects of feeding pattern and crude protein (CP) content of dry cat foods on urination frequency (the number of urination in a day) and the diurnal variation of urine pH. The effect of feeding pattern was examined in Experiment 1 (n=7), in which a commercial dry cat food containing 30% CP on DM basis was used. Although urine volume did not change, the urination frequency decreased when cats were allowed to consume the dry food only for three hours in a day. The restricted feeding time resulted in a marked increase in urine pH after meals, but urine pH was comparatively stable and higher when cats were allowed free access to the food. The effect of CP content of dry cat foods was examined in Experiment 2 (n=12). When cats were given free access to dry foods containing 29%,50% and 71%CP on DM basis, both urine volume and urination frequency increased with an increase in CP content of foods. However, the increase in dietary CP content resulted in a decrease in urine pH, which was relatively lower all day when cats were allowed free access to the food containing 71% CP. Present results suggest that free access to high-protein foods is effective for the prevention of struvite uroliths in healthy young adult cats through urine acidification as well as an increase in urination frequency.

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