How dominate are the short legs of a Dorking? The 5 toes with the feathering could come from silkie, faverole or sultan. However all 3 are crested. If the feathering comes from 1 parent and the toes from the other (or side of the tree), it does add in houdan and Dorking. The houdan crest and muff/beard sort of eliminates that one too, though. They have excellent barring, though. Cuckoo Marans are more common than French Cuckoo Marans..... the skin color is all wrong for a silkie mix (I'd expect at least 1 to have some of the black skin) and wrong for Marans.... body build doesn't fit Dorking either....
Sorry for the mental ramble. The good barring (and skin color) still makes me think half Barred rock x 5 toed, feather footed, non-crested, non-bearded mix. However, I've seen a crest pop back up when neither parent has one, but a grandparent does. Definitely a genetic puzzle.