Cute ! Cuckoo ?
I'm not sure. I'm running a mixed color pen right now - two Partridge cocks over one Partridge hen, two White hens, one Cuckoo hen, one Silkie/Cochin cross Blue hen, and one Black hen. But I'm fairly certain that neither the Patridge nor Black hens are laying and this on doesn't look like offspring of the Blue, so I'm thinking it's either from a Partridge X White cross or a Patridge X Cuckoo cross.