Is these an unknown breed? Which one could it be?

[drumstick diva]

x2 Gray Farms

 

[Ramouila]

Is the 5 toe the original status for chicken or is this just a new mutation..? ?

 

[Gray Farms]

Its a mutation that was bread for. There are a few breeds that have the fifth toe. Sultans, Silkies, Favorelles, Dorkings, Houdans