Curtains in the coop to keep a rooster from crowing?

my old coop did not have any windows and my rooster still crowed when there was no light

 

My roo's start at 5:30 in the AM and there is no light at that time of the morning, doesn't get light until 7am but they still crow it up. I don't have a light in there either and it's a pretty dark coop in the winter cause I have all the windows sealed off. So I think it is safe to say that curtains will not help.

 

They crow---it is what they do!

You can't fake them out.

 

I tired covering one with a blanket (while in a cage) because I was in the city at my mom's house. That didn't work so I tried giving it treats anything to make it be quiet. End story, nothing stopped it. LOL.

 

I have curtains in my coop, heavy lined ones to keep out the drafts from the single paned windows....roo still crows whenever he feels like it.