Chamois Spitz have a tendency to have almost full white chicks. Usually that would be bred out by a breeder but this little one was from a hatchery I suspect
Looks like a pullet! Cockerels would have their pointed saddle and hackle feathers by now. She‘s definitely a Appenzeller Spitzhauben. She also looks to be a chamois Spitz as I know their coloring can be almost all white due to poor breeding.