i hope i dont confuse you or give you any false info, but as far as i know... yes, goldens/snow whites are used to get higher grade crs/cbs, but in return you are mixing genes so you'll get more golden offspring out of a clutch. basically your crs/cbs will should get a more solid "white", but every time you interbreed a crs with a golden/cbs you are getting father and farther away from a "pure line"
i let my crs/cbs/goldens/tb all interbreed, just like many others on this forum.
Thanks for explaining this Dany - okay, so to keep the line pure, I would want to buy higher grade CRS and then start culling and breeding the higher grades back to each other. Thanks!!! Thank was very helpful.