It is strange that dogs can be so clever in some ways and so stupid in other ways. My dogs like a wood fire to keep off mosquitoes. Often they see me make the fire burn by putting wood on it. But never do they have sense enough to add a stick to a fire that is going out. What happens when you tie a dog to a tree with a long rope? He will almost always trot round the tree. Soon he will not have an inch to move. Never have I seen a dog unwind the rope again!