"We live in the country and almost everyone near me has hens, but they rely on manual opening. They have all lost their entire flocks to foxes at least once in

"We live in the country and almost everyone near me has hens, but they rely on manual opening. They have all lost their entire flocks to foxes at least once in the time my automated door has been operational, but thankfully we have not. I have seen scratch marks on the sliding door indicating interested predators ..." We live on a very small island of private property inside a huge expanse of open space / wilderness and thus have very heavy predation on any animals we raise. In the case of our chickens, I just kept adding hot wires to the fence until nothing could get into the run. There are four hot wires now, two of which form a negative (back bending) slope. It is impossible for a thing to climb the fence now without touching (and holding) at least two hot wires. We've had our current flock for over a year with no losses, vs. losing every previous flock to raccoons and weasels every 2-3 months. I wonder if you would comment on this (seemingly successful) strategy - you seem to know what you're doing...