I'm looking for advice from others whose cats share this problem. I understand from my vet (a cat specialist) that this is some what common, but vets are not certain of the cause. There is evidence that the condition may be aggravated by certain foods/additives. In severe cases, cats with this problem are treated with monthly cortisone shots (which we have not had to do, thankfully). I put my cats on Branson Farms (one of the Blue Seal cat foods) and the cat with the lesions seems to be doing better. However, I'd like to learn more about this condition and other possible options. My cat (Totoro) seems to have fewer outbreaks but he stills seems "itchy/uncomfortable" in the areas of his mouth/muzzle where the sores break out. I'd like to see him as asymptomatic as possible. Any insights, advice or annecdotes regarding this condition much appreciated!