"No bird has more than four toes except chickens of the Dorking, Faverolle, Houden, Sultan, and Non-bearded Silkie Bantams, all of which have five toes. In these breeds the extra toe arises above the base of the hallux and projects upward, never touching the ground. In the Silkie, the extra toes often lie nearly in the same plane as the hallux. "
https://extension.illinois.edu/eggs/res13-feet.html
The last I I posted this I was told that Bearded Silkies have 5 toes as well. Looks like a cross.
Here are pics of Faverolles
http://www.feathersite.com/Poultry/CGD/Favs/BRKFaverolles.html
Dorkings
https://www.feathersite.com/Poultry/CGD/Dorks/BRKDorks.html
Houdan
https://www.feathersite.com/Poultry/CGD/Houdan/BRKHoudan.html
the spike on his head seems to indicate maybe a Houdan cross.