In this study, the contents of nitrate and nitrite in feeds marketed in Kars region were analysed. The amount of nitrate 'and nitrite in feeds were measured colorimetrically as suggested by Sen and Donaldson. The analysed feeds were beef cattle feeds (30 samples), dairy cattle feeds (40 samples), grass, feed for cattle (40 samples), straw, feed for cattle (20 samples). The levels of nitrate and nitrite in beef cattle feeds ranged from 101.2 ppm to 7714.1 ppm and from 11.2 ppm to 19.3 ppm, in dairy cattle feeds ranged from 82.1 ppm to 947.2 ppm and from 1.1 ppm to 25.4 ppm, grass ranged from 38.4 ppm to 182.1 ppm and from 0.2 ppm to 1.1 ppm, straw ranged from 13.7 ppm to 63.8 ppm and from 0.7 ppm to 1.0 ppm, respectively. According to the data obtained from scientific literature. it is concluded that the nitrate and nitrite levels determined in feeds will not give rise to acute or chronic toxicity in animals.