Here is my 6 month old RIR rooster Pablo giving it his all while wearing a rooster collar. We made ours out of 2" velcro and its been working great, we have it tightened to where we can get a pinky under it and we check it nightly when he goes to roost. He is now much quieter than our hens, you can't hear him from in the house. He doesn't love it, he does the occasional moon walk to try and back out of it but its kept him out of a stew pot so we're happy about that. We're moving to a farm in June where he can crow his little heart out, he just has to keep quiet until then .