I know you are all professionals here.....so I figured I would like a really good critique of my sanke. I bought it as a fry a year and a half ago at 4"...here it was then:

It survived our winter wonderfully.
I then let it grow throughout the summer...feeding good high protein food. It began to lose the black as it approached 8-9 inches:
That picture was from June of 06. Now, it is gaining the black again and I think that the hi is deepening....I can see some underlaying black that is coming up....could I get some thoughts on my koi? It is 13" long in these pictures....