Het Piebald, 100%? 50%?

[rlditmars]

het to normal= 50% het (out of all the normal babbies half should carry the gene)

I don't believe this is an accurate statement. Het to normal would allow every off spring to have a 50/50 chance of carrying the gene. But in this type of pairing, all, none, or some, of the hatchlings could have the recessive gene present.