In order to study the toxic level of dietary chromium and its interaction with other trace elements such as manganese and molybdenum on the growth, mortality and chromium accumulation in the internal organs, two experiments were conducted with day old chicks for a total period of 4 weeks. The body weight gain and mortality of the growing chicks were measured by two experiments. In the first experiment, the liver, kidney and pancreas were analyzed to determine chromium retention.. Growing chicks (0-2 wks), fed 1200 ppm and 1500 ppm of hexavalent chromium, exhibited considerable growth depression and mortality. Chicks (0-2 wks) fed 4000 ppm of trivalent chromium showed adverse effects on growth rate, but suffered no mortality. There was antagonistic interaction between hexavalent chromium and manganese and hexavalent chromium and molybdenum; however the mode and degree did not correspond to dietary chromium levels. Antagonistic interaction between trivalent chromium and managanese did not appear. Also, hexavalent chromium accumulation in the internal organs was slightly reduced by dietary manganese and molybdenum supple