This is incredible: I actually DO have vet invoices from 2002 when my girls Muffin and Taffy needed relief from what ailed them shortly after little Poe (whom the vet thereafter referred to as Typhoid Mary) had come to live with us.
We took the first one in two weeks after Poe's arrival, and there were a couple of such visits for each until assimilation was complete and they had adapted. In addition to fluids, they received Flocillin, Baytril (I think that's an antibiotic, too), and Carafate, an ulcer type of medication. The first one even got tummy x-rays taken because her abdomen had felt a little hard and distended. The doc had no name for the ailment; it was all attributed to getting used to the new cat - even though he had been thoroughly checked out and inoculated and had no ailments himself.