I'm glad to hear that it wasn't serious and that it's easily treatable. Several years ago both Storm and RB Pepper had some fleas and they're also indoor only. I blame it on either me bringing them in, a neighbor that has a flea bitten animal, or a dog giving it to Storm because I had taken him to Petco for his shots that year. Now I use advantage all year long and haven't had a problem since. Good luck, my boys hate the smell too.
I'm also glad to hear that Max's mouth is fine too.