Biaks take longer to change than any other locale. I have a 10 year old female that is still changing. She was about 40-50% yellow at 5-6 years old, but has only a small amount now. Most of the HY Biaks you see are what I consider young adults. If they are under 3 years old they are nowhere close to completed color.
Silgrit at 3 years old in 2004
Same girl in 2007......
And now.....
Hope this helps. If you are looking for true HIGH yellow adults, look for solid bloodlines. I have SCZ animals that produce some of the best yellow adults you will find. Check out the video I just posted of one of our females laying eggs.
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