ドライキャットフードの蛋白質源としてのチキンミールの評価

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  • Evaluation of Chicken Meal as a Protein Source of Dry Cat Food
  • ドライキャットフード ノ タンパクシツ ゲン ト シテ ノ チキンミール ノ ヒョウカ

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To evaluate chicken meal (CM), meat meal (MM) and corn gluten meal (CGM) as a protein source of dry cat food, twelve healthy adult cats (mean body weight; 4.0 kg) were divided into 3 groups of 4cats each, and allotted to 3 dry diets containing CM, MM or CGM as a main protein source in a 3×3 Latin square design with 3 weeks per period. The diets contained about 94% DM; about 31%crude protein (CP) per DM, and the CP from CM, MM or CGM occupied more than 80% of total dietary CP. All cats were allowed to free access to the diets and water. Feces and urine were totally collected during the final 7 days of each experimental period, and digestibility, water balance, nitrogen (N) balance, mineral (Ca, P and Mg) balance, and concentrations of urea, ammonia, creatine and creatinine in urine were determined. Although daily feed intake, water intake and urine volume did not differ among the groups, daily amounts of feces and fecal moisture content were higher (P<0.05) in the CGM group than in the other two groups. Digestibility of DM increased in the order of CGM<CM<MM, and digestibility of CP was higher (P<0.05) in the MM group than in the other two groups. As for water balance, only the fecal water excretion was higher (P<0.05) in the CGM group than in the other two groups. These results suggest that fecal water excretion increased with an increase of fecal DM excretion in the CGM group, in which DM digestibility was lowest among the three groups. Percentage proportion of absorbed N to N intake was higher (P<0.05) in the MM group than in the other two groups, and the utilization efficiency of N intake or N absorbed in the CM group was intermediate between the highest MM group and the lowest CGM group. In addition, proportion of ammonia N to the total urinary N was higher (P<0.05) in CM and CGM groups than in MM group, and that of creatinine N increased in the order of CGM<CM<MM. Utilization efficiency of P tended to be lowest in the CM group, although no difference was detected in that of Ca and Mg among the groups.

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