There's a bunch of info here that I left out but it was basically to show the lifetime of a Sdragon so if you have any extra questions ask them in your comment and I'll happily answer them.
This is mostly a reference for people who might like to own a Sdragon character.
As long as you follow the color scheme (which notice I gave free reign with the different shades of the basic colors) the markings do not matter you can make them as crazy or subdued as you want, that's what makes each Sdragon unique.

Young - Born - 1,000 years
Teen -1,000 years - 2,000 years
Young Adult - 2,000 years - 9,000
Adult - At 9,000 they start going into a semi-slow growth spurt and their body changes into final design. By 10,000 years they are at what they will look like until death. Most Sdragons live to be 50,000 years. There are special exceptions for immortal ones, but it makes it difficult on them seeing as their tail will continue to grow for eternity.