It's awful when they get sick so young. I had a dog that got sick at 8 as well, and I'm still not over it. I had had her from 2 1/2 months until she died in my arms, and until my daughter was born I had never loved anything like I loved that dog. She had been so healthy until she got sick at the end that I had thought she would make it a lot longer.
My thoughts are with you and your dog.