Wow, I'm just seeing this and hope the problem is resolved by now. Seeing some green discharge can be normal. However, it can also be from a detached placenta and you should be giving your Vet a call.
Not pointing fingers at justsally,but this is a good example of learning all you can when breeding dogs *before* you run into these situations. It's also a good idea, if you dog has not been under a Vet's care during gestation, to at least give your Vet a call and give them a heads up that you are expecting puppies. It is also a good idea to have handy information as to where your nearest ER clinic is located.
Hope all went well and mom and puppies are okay. Hoping they are, you need to know the proper way to care for them.
NO this is not normal. She most likely has an infection. She needs to be taken to a vet asap.