I have a pen full of porcelains, they do pop Isabel once a great while, the rest of them are all porcelains. I kept Isabel separated because of their desire color & type. When I cross them back with lavender, I get porcelain again mainly because they carried the genes. My pen of Isabels does produce porcelain even with Isabel roos over Isabel hens. That's just my pen of Isabel due to the crossing which they came from.