You may have done this, but i would research the internet regarding this….somewhere in my mind i remember reading that some cases can be traced to diet or how they are hatched….am not saying that it couldn't be hereditary too,
After checking a few sites, it could be hereditary, but also said incubatory humidity too low or riboflavin or vit. deficiency.
After checking a few sites, it could be hereditary, but also said incubatory humidity too low or riboflavin or vit. deficiency.
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