What would be a good age?

Hello Everyone, I Have Dominiquers,One Roo And three Hen's...Just Hatched Six Chicks...From What i Understand From Reading Here,
You Use The Roo's for there Meat And keep The Hen's Right? Okay, What Is A Good Age To Put the Roo's In the Frezzer? I'm Thinking About putting Some In the Frezzer And Selling the Rest...And I'll Be putting More Eggs In the Bator This Weekend...My Chicks Will Be Two Weeks Old, And Buy The Time These Hatch I'll Be Able To Put them Out side...Thanks...........