Rural Gardening: I can't make decisions so need your help!, 1 by Gwendalou

Gwendalou wrote:
This pic shows approaching the area from where you would drive/walk in. Ignore the weeds. I planted a little garden along that fence and it got overgrown. I plan to weed it out and make it nice again!

You can see that that fence, which forms one fence of the 'run' area, is not a tall fence. It's a little taller than 4 feet. So if I want to cover the top of the run, I'll have to either make it slanted and you won't be able to walk under that edge, or I'll have to put in some sort of fencing along that existing wooden picket fence.