This needs urgent veterinary attention. Diarrhoea in puppies is a serious condition because they have so little reserve. It can rapidly lead to dehydration and death. It can be caused by any number of things including worms, bacteria or virus.
I would be calling your vet .. It could be Parvo and thats one thing you don't want to mess around with ..
I just went through that and it smells like death ..
I just went through that and it smells like death ..