No, I would not soak the feet after the bumblefoot is treated, until the wound heals from the surgery. That might take 7-10 days. Your vet may give you instructions on how long. You can treat the scaly leg mites, however, with applying oil to the legs. Since she has feathered legs, I might consider using ivermectin pour-on instead 0.1 ml for every 2 pounds of weight—give once and again in 14 days. Toss her eggs for a month. That will kill the leg mites right away.