Bullying/joining the flock

[Chamelaucium]

Hi Everyone

Interested to understand why this beautiful young boy (silver?) is picking on his sister.
They are about 8/10 weeks and Belgium d’uccle.

Should I remove him from the group?

And can I move them all into the ‘big’ hen house now with the other girls or do I have to wait till they have left their mum?

Sorry if this these are silly questions, still understanding the world of chickens

 

[Roo5]

What do you mean by picking on?

 

[Chamelaucium]

What do you mean by picking on?

Pecking her, even when she try’s to get away he still go’s for her