First of all, if you have taken on the "responsibility" of breeding a dog, you should read and educate yourself as much as possible! Glad you consulted with the Vet. Yes, they can have a clear discharge. If it dies not look clear, there is any blood in it or there is an odor, there may definitely be a problem. I hope you know that that breed usually needs a C-section to deliver pups. Discuss this with your Vet.