I have a backyard vineyard with about forty vines. One year they stripped the vines clean. Now the only thing that keeps the turkeys out is bird netting -- all over. I built a cage for the netting with posts and rope, as they will just push netting up to the fruit and eat it through the netting if you just drape the nets over the vines. Their latest trick this year is to jump on top of the netting and break the ropes and posts so the net drops down to the fruit zone and they eat he fruit through the netting. So now I have stronger rope and post supports. Stringing a wire about 12 inches above the top of your fence may discourage them, because they like to get onto the fence and look around before jumping into your yard -- and eating your fruit and veggies. Yes, they are vicious and have strong claws, so be careful about getting close to them.