You can have a 50%, 66% or 100% het! Some say het pied have markers but there is het pieds with no markers so the markers don't really mean anything. You need to buy hets from a well known breeder because there is no way of knowning what is het and what is just a normal. You need to breed to hets to known if they are hets or not! A het to a normal produces 50% possible hets which mean half the offspring is het but you can't tell so its a gamble. A het to a het produces 66% posssible hets and homozygous X normal(or het) will produce a 100% het!