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Hello, this is Dr. Jess. I am very sorry to hear about your dog! It sounds like a tough situation! If she still has open sores on her skin, then I do think an extended course of antibiotics is needed. Oftentimes with pyoderma http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=1571 cases we may need to go on extended courses of antibiotics depending on the severity of the infection (sometimes longer then 4 weeks).
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