The effect of the complex vitamin-mineral preparation Hemobalance for the optimization of hematopoietic processes in animals during complex restorative therapy and the probiotic preparation Vetom 1, containing at least 1ˑ106 CFU / g of Bacillus subtillis microorganisms, strain DSM 32424, on the concentration of leukocytes and lymphocytes in the blood of Abyssinian cats was studied. 10 cats of the Abyssinian breed were involved in the study of this drug. They were kept at home, having the same diet as cats with liver and pancreas pathologies. The cats were divided into 2 groups (control and experimental), 5 animals each. The experimental group of cats was given the probiotic preparation Vetom 1 based on apathogenic bacilli at a dose of 50 mg / kg once a day every day for 30 days per os. Additionally, the cats of both groups were injected intramuscularly with the complex drug Hemobalance for 30 days at a dose of 0.25 ml. The study of hematological blood parameters was carried out on an automatic closed-type hematology analyzer Vet Auto Hematology Analyzer BC2800. In the course of our research, it was found that under the influence of the probiotic preparation Vetom 1, the concentration of blood leukocytes decreases within the physiological norm. Additional use of Hemobalance does not change this trend.