My cat had teeth pulled. A day later, she had an upper respiratory infection and could not eat because she could not smell as well as a blood test. 2nd visit, in which there was a possibility she could have diabetes. Then, she had a 3rd visit to redo the blood test because the previous test was somewhat iffy. 3rd visit, no diabetes. 3-4 visits, about $800 - do the math. Last I heard, they wanted me schedule another visit. Again, redo - NO!
They gave medications for the 2nd visit. The first 3-4 days I did not notice any improvement. Then I added apple cider vinegar (with the mother ) twice a day. After one day of this, she vomitted once and her nose started to clear. She is now eating, perfectly fine. ACV is my new go-to. Google it and read it yourself.