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Abstract: Phytases produced by Aspergillus niger have improved the digestibility of nutriments in monogastric such as poultry, turkey and swine. However, no published articles were found on the use of the enzyme in the dog feed based in canola as source of protein and fiber. Twelve German Sheepherd adult dogs (mean BW 27 kg and 2-3 years of age) were use to asses the effect of four levels of phytase addition (0, 250, 500 and 1,000 Units) in the consumption and digestibility of canola based commercial feed. The feed was pelleted and the enzyme was added manually at the time of feeding. The dry matter intake tended to be reduced as the phytase level was increased (p<0.05). Glucose in blood (mL dL 1) was reduced (p<0.05) with the addition of 250 and 500 phytase units. However, nutrient digestibility was augmented (p<0.05) on all the levels of the enzyme. In conclusion, the addition of phytase to the dog pelleted feed increased the use of nutrients in the gut.