I have a yorkie just had two babies 9 days ago. Just an hour ago I heard one just sneezing quite a bit. Now she has a runny nose which appears to be clear and I hear a rattle. This really concerns me. She seems to be eating okay. Is this something I should be concerned with. I appreciate anyone's opinion. Thank you.

I would get the pup to a vet to be examined. Young pups are very fragile and can deteriorate quickly.

There are a lot of things that can cause a rattling sound when breathing, it is usually caused by fluid on the lungs but you will need a vet to determine the exact cause for the fluid.