it was strange , he felt , that so-called intelligent dogs , horses and dolphins never had any difficulty indicating to humans the vital news of the moment , e.g. , that the three children were lost in the cave , or the train was about to take the line leading to the bridge that had been washed away or similar , while he , only a handful of chromosomes away from wearing a vest , found it difficult to persuade the average human to come in out of the rain .