My daughter has cared for her Betta for about 10 months without any problems, Yesterday she told us that Ribbon didn't eat her food (I know it's a he, but a 7 year old girl refuses to believe anything that pretty is a he). I went to look and found that Ribbon had two small round protrusions on either side of his mouth. The top of his jaw looked a little sunk in perhaps as well, but I'm not sure. The fish bowl has been changed regularly with no interruption to the usual schedule, and we've never had a problem with this Betta before. Any thoughts?