One possible cause of Marni's recent fever may be her continued teething (she may be teething until she's 20).
Yesterday I discovered that her lower right canine had popped through and more seem to be on the way.
I've lost track of how many that makes for Marni. I think she's at 10 right now. I'll have to do an inventory the next time I can get to her mouth when it isn't crammed with food.
