Thank you for the pictures, beautiful and serene.
The thought of trying to get a chicken to roll over.. oooh - that is funny!
No - chicken submission is the squat. Put your hand on their back and push down. Hold them down until they stop struggling. Like you are a rooster and they are the hen and need to submit to you. You can pull on a few feathers near their heads if they try to bite you - not pull them out - just tug on them.
Roosters usually pick up the food and drop it a couple of times, they don't always hold it. Your fingers look like food - so if you hand feed be prepared for the stupider ones to try and eat your fingers... If your fingers looked and were as tough as beaks I think it would be easier... Long fingernails maybe?
Thanks for the laugh!
What a nightmare...