I have a liter of eight puppies. They are nine weeks old and about four days agothe puppie started acting tiredshe still ate drank went to the bathroom and played but didn't play as much as she usually didshe wanted to be luved on and acted tired that was it and the next day she diedthen another pupppy started doing the same thing and it diedivr called the vet they weren't to alarmed but another one has done the same thing and died to they never do it together they only do it one at a time (get sick)what could this be and what do I neerd to do to help them before I loose the whole liter? They done haveTtemps no diarehano vomitting just tired acting

You need to take them to the vet. There are so many things that it could be, and no way for any of us to make a diagnosis. To be brutally honest, many puppies just don't make it. Nature is not kind, and only the strongest will survive. But there may be something that the vet can recommend.

I would find a vet that is concerned. A whole litter of well bred, well cared for puppies should seldom be dying like that. I make little attempt at trying to remember what symptoms go with what disease and am not going to try guess what it is. Get the puppies to a caring vet while some of them are still alive.