Oh hmm maybe it is an older policy and she didn't update that website? Here is her Facebook page
https://www.facebook.com/CaliforniaCountryRanchPoultryAndWaterfowl it has all the details about getting eggs from her. Looks like just hens choice but she tries to get you the colors you most want out of what is available if she can.
Sure.
It's not a recognized color and is basically just splash with red leakage that lends to a tri color appearance hence the term splash calico. It can look really pretty and there are definitely people interested in the color but there are others who don't take it very seriously just seeing it as a faulty splash.
I'm not sure about the best way to go about creating it but in theory crossing red to splash or blue should be a good start. You want to get as much red leakage as you can into them but breed back to the splash color. It's probably going to be a bit of a process getting back to splash and keeping a good amount of that red brought in by the red parent. The first generation of red crossed with blue or splash I'd keep the blue chicks hatched and try breeding them together. You'd get multiple colors from that crossing but the ones that turn out splash are going to tell you if you are going in the right direction and have enough red bred in or if you need to breed the f2 splash babies back to a red and repeat the first step. I hear from breeders working on it that it is a tricky color.
I'm working on it myself but am just starting. I've got some splash babies with a very little bit of leakage now but I think I'll have to breed them back to a red to get more red leakage.