Hi Peta, probably a bit late for this reply, but I came across your site while researching oxalic acid poisoning in poultry. Several of mine are staggering and having trouble walking after eating quite a bit of it - so I wouldn't recommend feeding it to them. Also, gardening guru Malcolm Campbell has suggested fertilising where it grows, as it comes from poor sandy soils in South Africa, and doesn't like rich soils. I'm currently giving it a go. (I'm in S Aus). the other thing I've tried is carpet - that does work by smothering them, but you have to leave it there for at least a couple of years, so you lose growing space. Hope your raised beds have worked.
