> Always best to have it checked, even if all the vet does is send you home with some Pro-Kolin or similar.
Sadly once this happens, next time you don't really see the point going to the vet stressing the puppies when they are already not well and spending the money for nothing.
One time we had a litter of puppies 8 weeks old healthy and strong, went to have their first vaccinations and health check and the very next day each puppy but one has fallen very ill and very quickly - vomiting everywhere, watery poops, no interest in water or food and finally being completely lifeless blank eyes sitting or lying in the corners of their pen and only thin grunts of pain here and there. All in the matter of hours.
Needless to say we rushed to the vet, I asked the nurse on the phone if I should bring one puppy only, given that they all were in the same state and at least the others would stay at home without being moved, given that we live 3 minutes away from the practice and if hospitalisation was necessary I would have brought the rest in no time. No, the nurse insisted that we bring the whole litter. So we brought the whole litter. The vet however examined only one puppy having heard that the rest had the same symptoms, said he didn't really know what was going on, and prescribed pro-kolin and rehydration fluids both of which we keep in regular supply at home.
I think I was mostly annoyed that the practice insisted we bring the whole litter which was completely unnecessary. I could understand the vet not knowing why the puppies were ill, because I didn't know either; having had dogs all my life and several litters I've never came across or heard about such situation. If this happens agains however, I don't see myself going to the vets because in the end it did feel like a waste of time... Definitely won't be bringing the whole litter no matter what the practice insists on.
Good news were that puppies recovered as quickly as they have fallen ill, after squirting rehydration fluid in their mouths every hour and smearing pro-kolin paste on their tongues three times a day, in about 6 hours they started coming back to life, and next morning were bouncing about as normal though soft poops lasted for another 3 days or so until they firmed up.