Abstract
An 8-year-old female Japanese Chin presented with a 5-year history of nonseasonal pruritic dermatosis and chronic diarrhea. After feeding with a commercial hypoallergenic diet made of chicken and rice, instead of home cooked one containing soy sauce, the symptoms were completely ameliorated. Diarrhea recurred by adding soy sauce to the diet, and then disappeared without soy sauce. The dog remained healthy on the commercial diet for two year thereafter.