Do you have support for this claim?
I've been breeding chickens for a while and never YET heard or experienced THAT one, and THINK it's inaccurate but never stop learning.
Sounds like a WISE choice!
Mites/lice/parasites are easily dealt with and honestly the LEAST of concerns.. Respiratory disease, Marek's and others are far larger threats which CAN be HIDING dormant not YET seen at their other home.
If you want Sizzle, hold out for Sizzle.. there's NOTHING special about a cross bred Silkie/Dom.. it's just a hard feathered barnyard cross.. they'd be lucky to give it to me for FREE.
Which valley are you in, adding your general location to your profile might help folks make their best suggestions possible at a glance? Heed that first lesson and don't dismiss THIS one.. BIO SECURITY is KEY to protecting the birds you already have.
Also welcome, I hope you're enjoying BYC!