The OH and I took Biscuit to the emergency vet last night, because she threw up about 20 times in four hours. The vet said her xrays showed no problems and her bloodwork was OK except that she was dehydrated and had a slightly high white cell count. (Possibly due to inflammation?) We decided to have her admitted for 24 hours and given fluids and medicine.
This morning the vet reported Biscuit to be doing better, and if she keeps food down, she is on schedule for release this evening.
In the meantime, Angus peed in a cardboard box in my study.