Sunday morning she came in the house with tremors all over. She was also heavily salivating. I took her to the doggie ER. They suspected some sort of pesticide poisoning, either a permethrin or an organophosphate (like Sevin).
Although we could find no evidence of any pesticide jug that she had gotten into, it's a good time to bring up the issue of putting away things when you're done with them, especially pesticides if you have animals or kids around.
Lily had to spend the night at the vet but she's home and well now. Animal Care Center and Dr Hall, THANKS!