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Hello, My 11 month old doggie who has a sore in her mouth. It's been there for about 4 months. We took her to the vet a few weeks ago who didn't know what it was and gave her a course of 7 days of antibiotics. She's finished the course now and the sore still looks exactly the same. I was hoping that someone could please give me a second opinion? Here's a picture of the sore in her mouth: http://postimg.org/image/7uff4f703/ Thanks for your help!