Don't want to start anything but to me it sounds like you need to either find a new fence or build covered kennels or just fool proof your fence like mad. With the amount of dogs you have, I know things happen, but a lot of the things that have happened with you involve your dogs getting out of your fencing. You've had dogs disappear, get shot, get hit by cars a few times, and one that routinely chases cars because he breaks his chains everyday. Find some better fencing or build kennels and you will find your answer.

I am sorry that Lucky is missing and I hope you can find him again. Is he neutered? Maybe he found some lucky girl he wanted to "date".