Hello, I am new to this site and we have a wonderful Flemish Giant house rabbit that has developed sores in the corners of his mouth. We clean with q-tips and apply neosporin but they have lingered for a month or so. No unusual behaviour, he eats well and is acting normal. He has the run of the house and we let him run freely in the yard on occasion while watching. Any thoughts on the cause or cure? We love him dearly!