"I am planning to order Hearty Heart for my elderly minpin. He is on enlapril heart medication and furosimide (lasix) and Hydrocodone (steroid for coughing). Do I need to stop all these medications when giving the Hearty Heart or just the enlapril?"
It's not recommended to take Hearty Heart with ANY conventional heart medication. I would caution you against it. If you do decide to choose the natural products, you will need to coordinate the other medication with your vet.
I am sorry we couldn't help you further.