Two weeks ago Carina spent a Saturday and Sunday snizzing her head off By Monday I took her to the vet and he said it was a virus, he had seen many dogs with the same symptoms lately. He gave me antibiotics and anihistaminics and said to keep an eye for runny nose or eyes. The snizzing stoped in a couple of days. She's fine now.
Your pups may have a similar problem. I hope they get well as fast as Carina did.