I have two roosters and live with neighbors nearby. The boys started to crow so I got rooster collars. They seem fairly effective when I get them on and tight enough. These are the Velcro type and seem to be on tight. But the have been able to get them off a number of times. The end of the velcro seems to be tattered. I have seen the hens peck at them. Is there better ones or a way to keep them on. They work much better when on. Suggestions appreciated.