From: http://www.peteducation.com/article.cfm?c=1+2141&aid=2517It may be helpful to switch food and water dishes to a stainless steel or glass variety in the event an allergic reaction may be a contributing factor (cats can be allergic to plastics and dyes). Using a very shallow dish can also be helpful. Owners should regularly clean the chins of cats who are prone to the development of feline acne and/or have poor grooming habits.