I'm pretty sure it was the plastic bowl, but we also gave him a flea treatment. It took about a month before it finally all went away. Hasn't come back since.
Good luck!
My little Butters just got the swollen lip. He's a year old and this is the first time this has happened. He's eating fine, but does seem a little more lethargic than usual. But it's been really hot outside lately so he could just be trying to cool off. I noticed some fleas on him and he eats...
