Dog -- Why do dogs bark? -- Why do dogs howl? -- Do dogs show remorse? -- How does a 'top dog' behave? -- How well can dogs see? -- How well can dogs hear? -- How sensitive is a dog's nose? -- At what rate do puppies develop? -- Why are some dogs difficult to control? -- Why do dogs dislike some strangers more than others? -- Do dogs have a sixth sense? -- Why is a sausage-in-a-roll called a hot-dog?