Well, when getting baby corns for teh shop I like to get oak babies. 1 they usually eat very well. 2 they are a great looking snake so easy to sell.
I've never tracked them, but I know I've had 20 or so and as hatchlings all dark. then like you say they change with age and number of sheds. I like to watch teh females that have the best colors. but it changes. 1 month I have my eye on a snake. Then 2 months later a snake that was rather non spiffy, all of a sudden is my top ranked baby.
I'd GUESS by 3 months you really start to see what they will be. But the number of sheds clearly has a great effect on how fast they will get there.
last year I was hiding a female. She had a background of a leather color. Quite different. She is one of my favorite customers. So, one day I sighed,, you looked at me and said what? I said, well, only for you. I brought her out and she said SOLD! I know the snake has a GREAT home.
If i ever found a male like that, I know who has a female lol
Hope I helped?
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Thanks for reading.
Big Tom
www.HerpZillA.com