I took my little 16 yr old Foxie to emergency one night with a continual cough. Worried as she had been diagnosed with heart murmur but not on meds. X-ray done, no bloods but Furusemide given. Two days later nitveating, vomiting - took to her own vet - bloods done - diagnosed with renal failure. Placed on Vetmedin for heart, renal diet, anti nausea tabs etc. 6 weeks later, still not eating well, trembling a lot. Not eaten a thing for 36 hours. Back to vet and he decided to stop the vetmedin. I also same time was given some herbal kidney support by a friend. That was one month ago. She hasn't stopped eating, there is no trembling and she is doing well. Currently on no heart meds. Was it the Vetmedin that kept her in that terrible state. I really don't know. Any similar experiences out there??