Anytime. As a hunter and pet owner I do have to say that I would never knowingly shoot anyones pet, whether it be a duck, deer or whatever. Just remember though there are those types out there. Also check on the internet about the hunting season dates, this may help if they are already involved in any illegal hunting. Not sure what pinioning is? I've never owned any ducks, but have been looking into this. Keep us updated on any ideas you come up with.