Sorry to hear that... My dog was always the same, but one day he refused to eat. I got him some salami he always loved. He even didn't want that for the first time in his life. I started to worry, it was 5PM or something, than he started to cough. I am miles away from doctor and it was winter. I thought I will take him to the animal doctor next day. Than he started to cough blood, I was calling everyone, my mom, dad... But noone was at home that time and I was 16y old or something. My dog died 1 hour later in my hug, I won't forget it to the rest of his life. He just started to breathe slower and his heart stopped. Saddest story of my life.