I think he is saying the school won't allow the electric fence, not that he thinks it's a danger to the kids. I can understand the school. Parents will sue over any little thing these days. I am a parent of 4 small children myself, and I have seen how some parents react when their children get hurt. It's unreasonable, and I try not to be that way. I personally would be fine with an electric fence at my kids' school as long as it didn't border the playground of kids under age 6 (barring special needs), but I know MOST parents would not be ok with that at all. Not at all. They would throw a fit, that's what would happen. My kids' school also has chickens, but they close them up in a very secure coop every day at the end of the day. They only have 2, so they have one of those little cedar houses with a small run. They are allowed out during the day, but are closed up every afternoon after school. My 6yo son actually does it most days while I'm picking them up. Another parent added hardware cloth to the bottom of the run to make it more secure. They have seen a fox out there trying to get in, but he wasn't successful. I don't have any suggestions other than fencing for keeping the fox out of the tunnels if electric isn't an option. I wonder if electric would be ok if it was turned off every morning before they kids got there and turned back on at the end of the day? Especially if it were a lower voltage one, like the one I have for my portable electric fence, not the super shock one meant for cattle I have attached to my barn.