Who's That!

Poor Little B has just spent quite some time at the window. He was fast asleep on the back of the sofa in the sunshine when what should appear but this dog. It just kept looking at him and pretty soon Little B was sitting more and more upright and then he began very low growling. This went on for quite a while and eventually he actually began to tremble. I though he might be frightened and tried to reassure him but he was not to be moved!