Hi, This is a picture of Courage the Cat (we called him that because when we got him, he was afraid of everything). We got him on December 5, 2017 from the animal shelter. He looked really sad, and we felt so sorry for him! He was really thin, and he was diagnosed with hyperthyroidism. He now takes 2.5 mg of methimazole in the morning and evening. He also has oesinophilic granuloma which presents as a small, round piece of plaque on the middle of his lower lip. But the thing that neither we nor his vet can figure out is that once a day or every two days he has episodes where his lower face becomes puffy. His breathing noticeably increases, and he breathes through his mouth. The second picture is how he looks when he has what I describe as an "episode." His eyes squint, and he almost looks like he is having an allergic reaction. Curiously, the symptoms go away as soon as he eats. I give him a plate of canned food, and his breathing goes back to normal, and the "puffy face" goes away. His vet says she does not understand it. He does not seem to be in discomfort and has no itchiness, in fact he tends to purr continuously when he is having an episode. He is also much more affectionate (he is normally a bit aloof). Does anyone have any experience with something like this? We'd sure appreciate any help or comments. (I have plenty of more pictures and video of him).