The purpose of my original post was to highlight to dog owners and users of PRP of a potential problem with poison in the park. Successfully done as over 2800 views. It was not to start a discussion for pedants arguing about the poison. It was unlikely to be rat poison the parks put down as they are aiming to poison an animal weighing 300g not an animal weighing 40 times that. The dog had never eaten mushrooms before or bark from trees......I think it safe to assume it didn't start that day.