The vet were awaiting results of blood tests and x-rays, but she was off her feet and not gaining weight. The vet had said that her kidneys and liver appeared to be functioning normal. I fed her in the morning, but she colapshed into her food. I checked airwairs all clear, tried to resus, but couldn't revive her. Could this be a blood disorder or parvo?

Parvo is usually accompanied by vomiting and diorreah, only 50% of puppies survive and that is with treatment, the figure is close to 100% without.

I would be leaning more towards something other than parvo.