The vast majority of foot feathering is caused by the dominant ptilopody genes. I do know that the dominant genes are in silkies and cochins. I believe that both these breeds carry both dominant genes, unlike less heavily foot feathered breeds, who usually carry only one. I dont know which breeds carry the recessive gene.
Yes, crosses are not necessarily pure X pure, but could be the result of mixed X mixed. And that would allow the removal of foot feathering. FWIW, I have a PQ silkie hen with no foot feathers.
Doesn't look like a silkie's head shape to me. And that comb...not a rose comb like I've ever seen. Looks more like buttercup, but not quite that, either. Comb genes can mix to make pretty odd looking combinations.