Oscar has what i am assuming, is a mouth ulcer. I noticed he was sort of grimacing on one side of his mouth for the past 4 or 5 days, but despite numerous inverstigations, i havent, until today, been able to find anything. Anyone else had any experience, and if so, what treatment, if any, was prescribed? Also, does anyone know of anything i can put on it, as its obviously bothering him a bit. Personal experiences (if any) please, not copied and pasted articles from Google. Some pics, but its not really very clear. Once you move his lips it flattens out, and if i try and take a pic whilst he's panting, he just tries to lick me.