congrats on the breeding

To answer your questions...

Pewters and patels are co-dom morphs. (pewers being a combination of Pastel and Cinnamon).

Ghosts are a recessive gene, also known as Hypomelanistic.

The problem with breeding a codom and a recessive to a female pastel is that you don't know which animal sired each baby (unless you get a cinnamon, super pastel, sterling or pewter, then you know the pewter sired the baby). If you get pastels or normals you don't know who fathered them, and therefor you dont know if the babies are possibly het ghost or not.

Many breeders will put multiple codom or dom males in with a female, but will only have one recessive in with her if they are breeding a recessive or a het. This guarantees that the offspring are a product of that particular male and are hets for his genes. If you mean to sell the offspring it is not fair to label them even as possible hets if you aren't 100% sure which animal sired the clutch.

Hopefully that made some sense.