I really think y'all are making a much bigger deal about deer jumping over a 34" panel... as my picture above shows, a fawn can clear that fence at 1.5 months old. I really think the size of the pen is more important than the height.
I have pigs that can climb over (yes, climb over - I have watched them on video) 34" panels, granted they're both boars and over 175lbs. I cannot imagine the amount of other hogs that would be able to scale a fence that much lower. Maybe I have some unique swine, I don't know.