we are back now, the electric fencing came, I attached the energizer to the inside of the coop, I decided to use the entire cage as a ground. I attached the ground wire to one of the poles, and I wired the electric wire out of the coop, I tried touching just the electric wire, and it barely hurt at all, my brother decided to test it, I warned him it wasn't safe in bare feet, but he touched the electric wire, and he said it hardly hurt at all, he decide to touch the cage, it didn't do anything, then he stepped on the electric wire, at the same time, and started screaming really loudly. he tried to step back but his foot got stuck in the electric wire for a while, I helped him get it off, but he went off crying. we are very concerned that it could kill someone, or something, we are not sure if we should still use it. the ground was dry. I would like to use it because I'm sure it would keep the predators away, but not if it is going to kill someone, Is it safe to use?
You have not stated your location. It sounds like your charger is not properly grounded. Use at least a 6 foot 5/8 inch piece of re-bar driven all the way in and attach the ground wire coming from the charger to the tip of this re-rod of re-bar. If you are in an arid location or have very sandy soil you may need a longer ground rod. Attach the ground wire using an electrical clamp like the light company uses to ground the electric service going into your house at your electric meter. There can be no shock or bite to an electric fence unless the circuit is completed from the positive or hot wire to ground.
On the lighter side, did the fence discourage your brother from breaking into your chickens' run? It will do just as good a job of educating chicken eating vermin to the fact that your chickens, or at least the fence around their run can bite back.
As painful as it is, an electric fence is the safest form of protection that your chickens can enjoy, up to and including your rooster getting his very own concealed hand gun permit.