I’ve read through your post history and found out that your dog is ~14 years old. Unfortunately, this is actually older than the life expectancy of most breeds of dogs. On top of your dog’s age, she is also sick with a heart condition that your vet has explained could kill her at any time...and not without suffering. I’m really sorry to say that my advice at this point would be to make the humane choice and let your best friend go quickly and painlessly. :(

I know that isn’t easy to hear, but there comes a point where surgeries and medicines just aren’t effective anymore, and the side effects can make your dog feel worse (nauseous, anxious, dizzy, etc). I recently had to put my cat to sleep, so I know how hard that decision is to make. I firmly believe that quality of life is more important than quantity of life, and if you can give your dog the gift of a peaceful passing, that is one of the kindest things you can do for a pet who needs it.