My bantams integrated very easily by putting them in my small chicken tractor inside the run, and then after a few days propping up one end with a rock so that they can come and go but the big chickens can't follow. Then I moved their brooder into the coop so they could be around the big...
There are bantam barred rocks, that would make sense as the cross, he really doesn't look like he has any other silkie traits. Are the feathers really silkie feathers? They don't look like my silkie feathered frizzle.