Thanks for your concern Daisy. Still no definitive answer. The vet ran more blood tests. Protein in urine is elevated, and it's low in her blood, which could be sign of early kidney failure, and if so is probably congenital. Heart EKG shows some irregularities too. Wants us to take her to a specialist for sonogram and more heart tests, but that vet is booked till Nov. It's possible it could be a minor heart issue that could be treated, but they have to make sure there is no heart valve infection. Not sure if the 2 things going on -- kidneys and heart -- are all because of one issue that hasn't been found yet, or if it's actually 2 separate. Hard to believe. She was fine till a month or so ago. Never sick. Very active and agile. Anyway, they aren't really treating her for anything except with an appetite stimulant until they figure out the problem(s).