That is not a red pyle. It perfectly matches something from a red pyle crossed with a black chicken.
Chicks either cream colored or cream with random black spot, feathering out white or white with random black feathers. Common for cockerels to eventually show some red on the wings, might show...
Pictures would help, as what you seem to describe- an entirely white bird with random black flecks could be 'read' as one of your red pyles crossed with something solid black.
Usually if they have not disappeared by the first adult molt the black flecks are a permanent feature. The...