And,my post wasn't aimed at Jeff's theory in any way.(wasn't meant to change the subject of the thread.) I think even if the marker method proved out,say 65-75% of the time,it is still a notable observation,and a valuable tool by which to make better decisions on which animals to hold back...I don't own any of the "calico" animals either,however I think there is obviously a biochemical flaw responsible for the appearence...common sense tells me that every rule has exceptions,but not every exception has the same explaination.
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