I need some advice on how to heal a wound that my Great Pyr has on her nose. It's from scratching at flies that sit on the end of her nose, which opens up the skin, which causes more flies to sit there, so she scratches more. It's a vicious cycle. The same thing happened last year. The vet gave her a course of antibiotics last time which healed the wound quickly. But this year the antibiotics aren't doing the job. Has anyone else had this issue with their outside dogs and,if so,what did you do to treat it?