We had about 5 affected. Rhoddie had only been put against our fence for a few hours by our neighbour. It had toppled into our field. I can't say how much they had eaten.
We lost 2. The others were not affected so badly and seem to have recovered okay. The 2 that we lost were the friendliest and would have been there eating it as it was being stacked.
Our vet said that 1 leaf could kill and although he tried, he basically said that there wasn't much hope when Rhoddie had been eaten.