This is the 2nd time this has happened. My cat Ginger has a fat lip. For some reason, she likes to chew on the neighbors climbing rose bush that drapes over on to our yard and we think a thorn got her. We shoosh her away when we catch her doing this, but for whatever reason, she continues to chomp away. It could be a insect bite too. It's not a tooth, I checked and don't worry, she's eating like a champ as usual and seems to be happy and content. She looks funny. Almost like she's wearing a kitty mask. Raquel says she has a joker mouth...big and wide. Whatever it is, it's slowly going away little by little. I just wanted you all to see the kitty with the fat lip.