We have found a dead rat in our garden this morning. This is the third dead one in a month. What is happening? We are really careful not to leave any food around. We have not put out poison. Perhaps someone nearby has done so? It's really worrying, we have young children. These rats are so horrible. We live in the city not far from a canal so we would expect some to be nearby - What will we do? Anybody doing autopsies on rats?