I guess there are different levels of pure to be honest.
I agree with the things everyone here have said.
I knew the entire lines of my bali flames. (and yes mine are still pure in the purest sense of the word.
my b flames are sacred to me lol) Yet one day, out of nowhere, porc shade popped out. (I am still thrilled don't get me wrong) But nowhere in the history of any of the lines I used was there a shade. It came from the begining when I started breeding with lazy dazies. That had been like over a year before my b flames. It proved to me that if there is a recessive trait anywhere in a line, it can come popping out.
But to me pure is when you have no chance what so ever of anything else ever popping out. The only way to truly achieve this is by backbreeding to a starter with another totally pure kitty. The way we do for the more recessive traits and use to do all the time with starters.
I think the only way to make a totally pure kitty, (just as an example) is to take say a sorrel, that has nothing but gens behind it and breed with a starter till it throws back the sorrel, then back breed the sorrel to the starter. Other than this, it's still pot luck. You just lessen the odds of the rec popping out by burying it behind the dom.
I too bury rec traits by constantly breeding the more dom traits till that's what they pass the majority of the time and so forth.
Since all the new traits now fall anywhere on the list, it changed the way we breed. There is very little "truly pure" left, unless it's the most recessive of traits.
