I have just been to check on my ewe lambs and they've managed to squeeze themselves into my son's rhubarb patch (arghhh!!!). They, or I think probably 'it' as there is only one set of hoof marks, appears to have eaten some of the three plants in there, (it's a very small rhubarb plot!) possibly a couple of almost dead leaves and a stick or two of rhubarb. As I have heard rhubarb is poisonous to sheep I'm more than a little worried! Does anyone know exactly HOW poisonous it is to sheep? Is it fatal??