Usefulness of Urinary Creatinine/Urea Nitrogen Ratio as Indicator of Body Protein Catabolism in Dogs Fed Low Protein Diets oleh Shushi Yamamoto, Yoshiyuki Ohta, Etsuko Hasegawa, Etsuko Hasegawa, Shiori Hashida, Yasuyuki Kaneko, Shinya Mizutani, Benedict Huai Ern Ong, Kiyokazu Naganobu, Shidow Torisu