What are your thoughts on no crow collars? Do they work? Are they humane? Got 2 pet silkies really like them one started to crow. would prefer to keep them. These will be my only 2 chickens. They have acclimated to their area and I am rather attached. They are about 3 1/2 months old not real loud. only crow in morning will this change as they get older.Think only one is crowing not sure yet.