I hope this is the right place to post this. It was the closest fit IMO. I have two questions: 1. How old does a frizzle cochin bantam chick need to be before you know if it's going to have curly feathers or straight? 2. If a chick has a headspot, that 100% means it'll have bars, right? It's an olive egger... possibly lol.
As soon as the wing feathers start to come in, which usually would be 1-2 weeks old, you will know if the chick is frizzle. If it is a smooth feather chick the feathers will follow the shape of the birds body. If it is frizzled, the feather, will point outward, especially the tips, like the opposite of a smooth feather. Usually if it has a head spot like barred rocks, it means it will have barring on the feathers, but if it is a EE, then your guess would be as good as mine. Possibly yes, but easter eggers are the most surprisingly colorfull birds and nothing about them follow any rule. Good luck. Post pictures if you have any.
You can generally tell if a bird is going to be frizzled by about 6 weeks, since by then, its wing/body feathers should be nearly fully in. Yes, head spots do usually mean the bird is going to be barred.
This is the baby olive egger (?) with the head spot. This is one of the frizzled bantam cochins out of a red frizzle cochin bantam roo and a black frizzle cochin bantam hen. Her wings are different than the others. Here's the other frizzle bantam cochins.