The studies carried out during the monitoring stage covered adult female blue foxes from the A, B, C farms. The second stage of the experiment included the animals from farm C. The adult females with offspring at an equal sex ratio constituted the experimental and control groups. The carnivorous fur animals received an antioxidant supplemented-diet to protect its components. The effect of dietary antioxidant additive to the blue fox (Alopex lagopus) feed on the chosen blood hema-tological indices (RBC, HGB, PCV, WBC, PLT, MCV, MCH, MCHC) was established. The dietary antioxidant dose employed (Rendox) did not negatively influence the animal health status. This supplement did not induce any significant changes in the blood hematological indices in female blue foxes and their offspring.