What I think she needs is LASIX (
For the fluid retention). Normally
for heart failure, Lasix are prescribed along with the heart meds. and can be given 1-3 times a day depending on the severity of the congestion. Once, the fluid is off her lungs, the cough and congestion will improve greatly. I'm surprised that this has not already been prescribed! Please, call or go see your Vet (Quickly) and discuss this. She will feel much better.....Good luck and keep us posted.....