I don't know. The only thread I know of on Pekins is this one. I don't know if it's currently being posted on but feel free to resurrect it! :D
https://www.backyardchickens.com/threads/pekin-bantam-club.1509612/
I have never kept Pekins, they are adorable! Roos sure are entertaining to watch them tidbit for the hens. Sounds like your hens are pretty smart! I had a hen that used to round up the other hens at bedtime. She'd get frustrated if the others were dawdling and would peck those milling around. :lol: