Stephen Wolstenholme wrote:
The problem with polystyrene is that my chickens then eat it!
(once it falls out, not whilst still in the pots!)
Does it do the chickens any harm? What comes out at the other end?

It doesn't /seem/ to have done any harm. I haven't found any polystyrene in
the eggs so far. :-P
I presume they just poo it out again.
..