My vet does not carry gentamicin and will not prescribe it and he will only sell me Pirsue by the dozen. What would be the next, best, over-the-counter alternative? I only have one doe that I'd like to treat (when I dry her up). She does not have mastitis (milk tested with LSU) but when she freshened last spring she had a lopsided, lumpy, fleshy udder. I have Lysigin and Covexin 8 to use on her closer to her kidding date (in June).