You don’t need to worry about that. The electric netting has a very high voltage but very low wattage. Volts are not what causes the big problems, it’s the watts. Plus it pulses instead of providing a steady current. That gives things time to turn loose if they touch it. It will shock but not harm them unless they somehow get tangled up in it where they cannot.
I’ve had a couple of snapping turtles, a snake, and a possum get tangled up in it. The snake and one turtle died, the other turtle and possum were not killed by the current. I’ve never had a chicken come close to getting tangled up in it.
I’ve been around when chickens touched the netting with their combs. Their feathers insulate them so the only way they get shocked is to touch it with a comb or wattles, maybe the legs but I haven’t seen that. What happens is the chicken squawks, jumps back, and immediately goes back to eating or whatever they do. It does not hurt them but they do learn to not eat that close to it.