I recently bought a female who has severe case of ringwormand now it has spread to almost every dog I have.I have tried topical ointments from the vet I have also trieda liquid rub from the co-op and neither seems to be working very well.any ideas on something I could buy that works pretty fast. I have been battling this for the past 2 months and am getting nowhere. Please help me I am lost for ideas. Thanks.