First of all let me say....Of course when I started out my first bitch was NOT a champion and what I learned from that experience I wouldn't do it again, now mind you she did produce my first homebred champion

However,I learned quickly from that experience I needed a CH worthy bitch for my foundation

Then when I started over my breeding program I started back the correct way breeding CH to CH...aka CH Groveshire's Under the Radar to CH Myboy Camality Jane who by the way was specialed also and was in the top 10 when she was being shown and was #1 yorkie bitch in breed in 2005

I still have Radar who by the way was in the top 5 in breed in the USA in 2008 but am on the search for a show quality bitch so that is why I haven't bred in over 2 years because my search is for the right one and not something I have to do in a hurry because I want to continue to breed and show to the best representation I can....I have been in the show ring but have been showing Radar or for others while I am in search of the bitch that is worthy.
Now on to the question....I don't mind a modified silk coat (no it's not a soft coated dog) but the texture is more on the silk side but of course you want the true silk, which by the way Radar is a very true silky dog but a very true silk is a thin coat and takes forever to grow. Yes, some breeders in my opinion do bring in a soft coated yorkie to their breeding program to get a thicker silk coated dog, not to get color but to get a heavier silk which is what I would call a modified silk. Hard to explain the difference.
There are soft coated yorkies becoming champions but I don't see cotton coated as much anymore being shown as it is very very incorrect and most cotton coated dogs are black instead of a dark steel blue and with the DQ it's halted that. I see more soft coated in the ring than cotton coats.
I hope that helps answer your questions
Donna