Will electric wire fencing be sufficient protection against predators (assuming power doesn't go out), or should I put up regular fencing too? We have foxes, coyotes, and possums in the area. We are putting up 6ft electric fence with 6 wires and strong charger to keep deer and other critters out of the garden, orchard, and vineyard. I'm hoping this will be enough to protect the chickens too. Anyone tried this?