I recently built a really pretty lion-habitat using a custom fence I built. the custom fence was made out of wood, so it counts as climbable. To counter this, I placed a metal fence, which I made unclimbable, inside the custom fence. The lions just walk (WALK! They don't even climb, they WALK) RIGHT through both the metal barrier and the custom fence. I mean, I kinda get it, it's climbing on the blue fence outside, but that shouldn't be possible since there's a METAL BARRIER in the way. Please give me some tips on what I can do to save this habitat because I really don't want to remove it.