On Monday evening, Rosie had an adverse reaction to a vaccination* and had to get emergency steroids, antihistamines, and fluids. She spent the night at the emergency vet before they cleared her to come home. And she's still kind of groggy and out of it, but much much better.
She does this just to keep us on our toes, I think.
*Leptospirosis; the evidence seems to indicate that vaccination is not going to be much help anyway, so neither of them will be getting this one again.