Hi Aaron!
Goats are closely related to
deer, which need an 8-foot
fence to be kept in or out of an area! Luckily, most goats don't have that much desire to jump. We do rotate our goats through brushy areas, and we use the Premier ElectroNet, which isn't that tall. Your goats sound like my la manchas! They were jumpers! However, they loved their browse, so we were usually lucky that whenever we moved them to a really brushy area, they got so busy eating that they didn't think about jumping out. However, as soon as they were done eating, they'd jump. So, we just had to make sure they didn't run out of food in there. I'm sorry I don't have a better solution to your problem!
There do seem to be some goats that don't jump as much though. Only one of my ND doe lines seems to produce jumpers. A friend with Nubians was at my farm one day and saw one of my la mancha kids jumping up outside the Dutch door to my barn, and she was shocked because her goats don't jump at all. Good luck!