Sometimes he has a hard time breathing and you can hear the fluid I've tried amoxicillin antibiotics and Mucinex I'm

I'm so sorry that Gypsy isn't doing well! I would not give him Salix until he has been examined in person by a vet as you could potentially do Gypsy more harm than good.

I agree that Gypsy has symptoms of congestive heart failure, but there can be other causes for the symptoms you have described as well, including pneumonia, bronchitis, lung cancer, a ruptured thoracic duct, etc.

I am sorry, but you really need to bring Gypsy in to a local vet for an exam, including listening carefully to his heart and lungs with a stethoscope. They may need to take chest x-rays as well. Once the vet has determined the underlying cause of Gypsy's symptoms, they can then formulate an appropriate treatment plan based on the clinical exam findings. Dogs with congestive heart failure usually need a heart medication in addition to the Salix to help prevent the back up of fluids into the lungs in the first place. The Salix only helps remove fluids, it doesn't do anything to help the heart failure.

The vet should do some bloodwork as well to assess the health of Gypsy's kidneys. If he has kidney disease, then he may not be able to have the Salix as it could harm his kidneys even more.

If you have financial concerns, you could try calling your local humane society, animal shelter, or ASPCA as they generally know if there are any low cost vets in your area. I realize it can be hard to justify putting a lot of money into an elderly dog, but depending on what is going on with him proper treatment could give him a year or more of good quality life. I hope Gypsy is all right and that he does well for you!