I'm trying to make my coop as predator proof as possible. What kind of deterrents do I use on the doors to discourage animals from getting in?? I thought i read somewhere that raccoons are pretty crafty and could possibly slide or turn a latch to open it?? Do I need to padlock every door? I want my kids to be able to go collect the eggs in the morning, but if i have to padlock it, then they won't be able to do this without assistance. So, what kinds of latches/locks do you use??