Collie, the watch-dog, was sleeping lightly, and came rushing around the corner of the house to see what strangers were there, but when he saw who they were, he dropped his tail and walked away. He was old enough to know many things, and he knew too much to fight either a Skunk or a Weasel. Every one lets Skunks alone, and it is well to let Weasels alone also, for although they are so small they bite badly.