I've never had roosters and hens, so this may be a stupid question. But I'm wondering how long a rooster needs to take to actually fertilize the eggs because we've watched our 19 week old Foghorn mount his pullet, Snow White, and then dismount in what seemed like a very short time. There's no chatter or squawking going on - just on and off. So I was wondering if that was it and he was done or if this action is just the preliminary stuff leading up to a longer act later?