My last bitch jumped without an issue, she jumped a barbed wire fence close to home, one she jumps regular and clears easily. Sadly she got caught on it one day ended up costing 400 at the vets and she was in such a mess. Same thing happened to my lab, out beating one day and she got her back leg caught on the horrible stuff. Forked out another couple of hundred again. To be honest I'm not overly bothered that my current bitch now doesn't jump, every time I see a dog approach barbed wire my hearts in my mouth!