my pups are 4 wks old and today and yesterday one of them has been shaking quite bad. today it has been sick 3 times.
has anyone else had this with pups and does anyone know what could be wrong with her?

Contact your vet immediately.

Contact your vet straight away.  Has the mother and pups been wormed?

Id get the pup to the vet as soon as you can

denese, I can't reply on the thread that we posted on, but I suggested RINGING the Vet because if they think it may be a contagious disease, then the Vet may well ask the poster to keep the pups in the car to be examined rather than distribute the virus around the surgery where other already sick animals may be! :)  It's easier for the Vet to disinfect himself if he thinks it maybe an air borne virus rather than the whole surgery, including patients and owners who maybe in the waiting room.
Taking animals with contagious diseases into the Vets is exactly how kennel cough, parvo etc are spread in an area.  It's a bit like going to the doctor with an ingrowing toenail and coming home with 'flu!! ;)

George have you been to the vet what did the vet say ?

George let us know how the pup is.  Had you
used panucar for worming?

it may be kennel cough,with a high temp,and if the sick was just white bile i but money on its kennel cough,there alot around again

have you wormed the pups.  I had one that was anemic that did this and the vet said to worm him and he turned around.  He probably needs blood work also.