Queen Mum
N.E.R.D.
Well, first of all, I had to laugh and laugh at your nine strand electric pen. I have never, ever seen one that "secure" before. They will surely stay in that pen.
However, if you use cattle panel with the two, three or four inch squares, the goats will stay in that pen. Make sure they cannot push the gate open at the bottom or top and squeeze through the opening. The other pen would not have worked because the bars and slatts are too far apart and they are lateral and do not have horizontal squares. They can flatten themselves down and squeeze out under or over anything that they can make themselves long and flat and scoot through. Goats the size of yours can squeeze under or through anything bigger than about 4 inches apart that is NOT electrified.
As an example Houdini, my mini LaMancha, would get the fence swinging at the bottom and run under it when it was 3 inches up off the ground before it swung back down. And it had a 30 pound log on it holding it down. (He was a strong little butthead.) We had to tie the fence to the ground. Now that we have a place where he gets regular food, he stays put.
However, if you use cattle panel with the two, three or four inch squares, the goats will stay in that pen. Make sure they cannot push the gate open at the bottom or top and squeeze through the opening. The other pen would not have worked because the bars and slatts are too far apart and they are lateral and do not have horizontal squares. They can flatten themselves down and squeeze out under or over anything that they can make themselves long and flat and scoot through. Goats the size of yours can squeeze under or through anything bigger than about 4 inches apart that is NOT electrified.
As an example Houdini, my mini LaMancha, would get the fence swinging at the bottom and run under it when it was 3 inches up off the ground before it swung back down. And it had a 30 pound log on it holding it down. (He was a strong little butthead.) We had to tie the fence to the ground. Now that we have a place where he gets regular food, he stays put.