Our puppy Dino - Severe Heart-worm Medical Issue!

My puppy nephew Dino is going through severe medical issues. He spent this past Saturday in the hospital after throwing up blood. When my sister brought him home, we thought he was on the road to recovery but we were wrong. Unfortunately he was still having some issues, so she brought him to a vet yesterday and he tested positive for heart worm. Dino was sent home with different medications to help his condition but last night things took a horrible turn and he had to be rushed to a specialty hospital in NYC for monitoring and had to stay over night. After a few tests we found out that Dino has had this issue since he was a baby, therefor pet insurance will not cover a pre-existing condition. The cost of medical testing and treatment have become extremely expensive. Please open your heart and help my sister!