I hadn't noticed anything unusual about her behavior recently except for a very mild, occasional cough
. Then, suddenly, last Wednesday, she refused to eat and had very low energy. On Thursday, after being examined by the vet, I was told she has congestive heart failure. The vet put her on 12.5 mg. of Lasix and 2.5 mg. of Enalapril twice a day. After five days of taking this medication, she's not showing much improvement. She still has very low energy and isn't eating much.