In this retrospective study, we investigated the fluid management during surgical anesthesia and occurrence of congestive heart failure (pulmonary edema) in MMVD-affected dogs undergoing noncardiac surgery. Dogs with MMVD were classified into stage B1 (B1 group: n=109), stage B2 and C (B2・C group: n=22) according to the American College of Veterinary Internal Medicine (ACVIM) consensus guideline, and dogs without MMVD (n=132) were used as a control group. As a result, no postoperative pulmonary edema occurred. There were no significant differences between the B1 group and the control group in total infusion volume during anesthesia (ml/kg) or in the percentage of dogs administered diuretics (mean ± SD: 21.5 ± 9.9 vs. 23.5 ± 10.2, 2/109 vs. 0/132). On the other hand, the B2・C group had significantly lower total infusion volume during anesthesia (ml/kg) than the control group (mean ± SD: 14.2 ± 13.3 vs. 23.5 ± 10.2), but a significantly higher percentage of dogs administered diuretics due to suspected volume overload (5/22 vs. 0/132). The results of this study suggest that dogs in stage B1 have a low risk of developing postoperative congestive heart failure, even with the same fluid management as dogs without MMVD. In stage B2 and C dogs, limitation of infusion and postoperative monitoring and diuresis may have contributed to the prevention of congestive heart failure.