Marans with smooth legs?

I've got a question for all you Marans breeders with wade jeane lines-
I asked them if they have ever gotten a bird with smooth legs and they said no. They never had that happen to them ever.
So, do your(Wade jeane) birds ever hatch out a chick with smooth legs? I've had a friend who bought her birds from my dark eggs and never had an outside flock introduced. But had some chicks hatch out with smooth legs. We asked them on darkeggs and they just said cull the birds. they didn't have any explanation.

Thanks