Journal of Pet Animal Nutrition
Online ISSN : 2185-7601
Print ISSN : 1344-3763
ISSN-L : 1344-3763
Volume 8, Issue 3
Displaying 1-7 of 7 articles from this issue
  • M. Yoshida, T. Matsumoto, H. Sakurai, T. Ito, M. Miyahara
    2005 Volume 8 Issue 3 Pages 69-73
    Published: October 20, 2005
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    We analyzed changes in peroxide value (POV), the ratio of C18 fatty acids, and synthetic antioxidants (butyl hydroxyanisole (BHA), dibutyl hydroxytoluene (BHT), and ethoxyquin) in three kinds of commercial dog foods (jerky type A-C) after their bags were opened. We also determined the amount of synthetic antioxidants in two kinds of bone type dog foods (D, E).
    1. The POVs of the dog foods were 1.2-1.9meq/kg immediately after the bags were opened. They increased to 14.6-19.9meq/kg when they were left in the sun for 15 days.
    2. The analyses of the contents of C18:1, C18:2, and C18:3, showed that they had 23.4-34.9% of oleic acids,11.2-18.4% of linoleic acid and 0.6-3.4% of linolenic acid. Fatty acids with high oleic acid are regarded as of high quality when used in dog food, as they are not easily oxidized and the formed hydrogen peroxide does not easily become decomposed.
    3. BHA was found only in the dog food E, an Australian product. The dog foods A-D had 1.53-2.06ppm of BHT. The dog food E had 28.59 ppm of BHT.
    4. The bone type dog foods D and E had 30-40 ppm of ethoxyquin. In the jerky type dog food C, in which ethoxyquin was detected, had a slow rate of POV increases, showing that oxidation is retarded. But the dog food A, in which ethozyquin was not detected, had a lower amount of POV than that of the dog food C, so increase in POV appears to be more related with the ratio of C18fatty acids than the presence of ethoxyquin.
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  • T. Aii, T. Hirota, S. Ishida
    2005 Volume 8 Issue 3 Pages 74-81
    Published: October 20, 2005
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    In order to estimate the intake of n-6 and n-3 fatty acids by dogs and cats from the dog foods and cat foods marketed in Japan, fat contents and n fatty acids composition in 9 dog foods and 10 cat foods were determined. In all the fat contents, only one cat food was below the recommended allowance (RA,90 g/kg dry matter) of Nutrient Requirements of Dogs and Cats (2003) but the other fat contents (56-256 g/kg) were between the range of the RA and the safe upper limit. In all the foods, one dog food was slightly below the RA (13 g/kg) of the linoleic acid content but the other foods (10.1-36.2 g/kg) exceeded their RAs. For the arachidonic acid contents,3 puppy foods were below the RA (0.3 g/kg) but all cat foods (0.1-0.9 kg/kg) were above their RAs (0.02 and 0.04 g/kg). And for the a-linoleic acid contents, one of three puppy foods was below the RA (0.8 g/kg) but all the other foods (0.5-4.1 g/kg) exceeded their RAs. In the eicosapentaenoic acid + docosahexaenoic acid (EPA+DHA) contents, only two of all dog foods contained EPA+DHA whose contents were above their RAs (0.5 and 0.11 g/kg), while two of all cat foods did not contain EPA+DHA, but the other foods (0.4-4.7 g/kg) contained EPA+DHA whose contents were above the RAs (0.1 g/kg). The ratios of n-6 to n-3 fatty acids of dog foods averaged 16.2 with the range of 4.8-27.0, while those of cat foods averaged 9.2 with the range of 4.1-23.0. The above results show the need to formulate the ration in view of the contents of long-chain n-6 and n-3 fatty acids as well as those balance in animal foods.
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  • Y. Nakata, H. Origasa, T. Nishimura, Y. Maekawa
    2005 Volume 8 Issue 3 Pages 82-88
    Published: October 20, 2005
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    A multielement determination of phosphorus, iron, calcium, magnesium, zinc, manganese and copper in pet food samples was carried out by inductively coupled plasma atomic emission spectrometry (ICP-AES, ) compared with the old analytical methods as atomic absorption spectrometry visible absorption method and titration method. Pet food samples(10g) were ignited in furnace at 500C for about 5hours. Each residue was dissolved in a 1%HCl solution, and was subjected to multielement analysis by ICP-AES. As a result,7 elements of 20 pet food samples were determined over wide concentration range from % to ppm level. On the comparative study of ICP-AES and old analytical methods, analytical results obtained by this ICP-AES agreed with those obtained by old analytical methods. The applicability of the mineral analysis by ICP-AES in pet food samples was confirmed.
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  • K. Matsumoto, M. Kaneko, H. Yamamoto, M. Funaba, T. Iriki, Y. Hatano, ...
    2005 Volume 8 Issue 3 Pages 89-95
    Published: October 20, 2005
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Our previous studies revealed that the dietary CP sources would affect the utility of nutrients as well as the capacity to form struvite crystals in adult cats. In the present study, effects of dietary fat sources on food intake, apparent digestibility of general components, nitrogen balance, plasma lipid concentrations and urinary excretion of struvite crystals were examined using healthy adult cats. Two dry diets containing either beef tallow or soybean oil as a main fat source were randomly allotted to 10 intact male cats in a cross-over design with five cats per group. Daily food intake was higher (P<0.02) in the beef tallow group. However, dietary fat sources did not significantly affect apparent DM digestibility, N retention, plasma concentrations of phospholipids, total cholesterol and peroxide lipids, urine volume and urinary pH, number of struvite crystals in urine, and urinary concentration of HCl-insoluble sediment. The present results suggest that not only the nutritional value but also the capacity to form struvite urolith is almost similar in both fat sources, whereas beef tallow was more palatable than soybean oil as a fat source of dry cat food.
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  • Takamitsu Aii
    2005 Volume 8 Issue 3 Pages 96-101
    Published: October 20, 2005
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
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  • Matanobu Abe
    2005 Volume 8 Issue 3 Pages 102-109
    Published: October 20, 2005
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
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  • 2005 Volume 8 Issue 3 Pages 110-114
    Published: October 20, 2005
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
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