article_snippet: The investigation found no obvious link between any of the dogs - even those who became ill within a few days in the New Forest.
article_snippet: Mr Walker said: 'When we looked at all their walking routes and other factors, we could find nothing in common.'
article_snippet: The results rule out early theories that the dogs had been poisoned by contaminated food.
article_snippet: the dogs also ruled out a link to the E.coli shiga toxin, another early theory.