Why does it take longer to get the maximum health benefit from a leisurely walk than from swimming laps?

Because the water has more pressure and it takes more effort to move therefore your muscles are working harder than you would if you were just walking. 

Well you see if you dont follow ur parent's expectations or rule you're going to get a beat

Your dog can sniff at or even eat a bit of catnip. the herb is edible and not harmful. just don't expect them to roll around like a cat would! your dog may scrutinize catnip by licking and smelling at it, or be totally indifferent to this stimulant.