Teaching a Rooster not to crow?

[BarrettG]

I have a no crow collar on my roo. He is still loud but it quickly dies off and gets deep instead of high pitch. One thing I noticed is all rosters crow differently. Some may crow Loud and often, while others may crow only a few times a day and be very low.

 

[Chickenluver106]

So it doesn'twork

 

[BarrettG]

It deepens the sound. But if the roster is extremely loud to begin with, then he may still be loud