I've been doing some preventative research, and well, it seems the large birds of prey are what really are brave here. We had an Osprey attack and kill a Creambar cockerel just feet away.
I know these birids, and the other large raptors we have here (I know for certain there's a few eagles nesting nearby, I see them just over the interstate from us constantly taking off from the same patch of tall trees) are protected, and I wouldn't *dare* injure a vital part of our wetlands eco-system.
However, I do want to prevent losses, so I would love to hear what deterrents you guys have used that have worked to really prevent these larger preds from even being tempted (we do have roofed coops/runs being built, but in the mean-time, we'd love to be able to graze our birds. (We have Large Fowl, and turkeys)