[MountainSide]

I just adopted two baby piggies for my younger sisters birthday. My brother and I went everywhere looking for coroplast, i found one place. But they were really rude and charged too much. We are both college students and couldn't afford the material.
So we had left over pond liner from the pond we made outside.
Instead of the coroplast we have pond liner attached to the grid, with zipties and paper clips.
I was wondering if this was safe?
It's too high for them to actually chew and they seem to enjoy it.