i kind of hold my hand like i'd be cupping food and instead of biting and nibbling they just put their bill in my palm and I can use my thumb to stroke the top of their bill.
I have three distinct groups in my flock, the original pekin girl that is just a survivor. No bill strokes there.
Have my khakis and rouen that had since attention and will tolerate it.
Have my 3 oddballs that I practically nursed back to health that almost will put their bill in my hand and...