Brandi, you should get rid of the plastic water bowl, too. Just to be on the safe side. You could also try one 500 mg. capsule of salmon oil (Omega 3 and 6 fatty acids) squeezed over her food every day for six weeks, and then cut back to one capsule a week for maintenance. I'm a member of a German EGC forum, and that's one tip I got there that has really helped.
Lei, a lot of experts believe there's a genetic predisposition towards EGC, but that it is triggered by allergies, whether to bug bites, pollen, food, or chemicals. It's often just called "idiopathic", i.e., they can't determine any cause. As it's an auto-immune disorder, genetics probably do play a role. Jamie is one of five litter mates, and thus far he, his sister, and one of his brothers have had it. One brother is already deceased, so there's no way of knowing if he would have developed it. The sole female started with the "plaque" form of EGC (skin lesions and hair loss; she was being fed Whiskas
) at a very early age, i.e, a few months, while both boys have had rodent ulcers on their lips. Jamie had his first outbreak at three, and his brother at seven.