Part 2....growing up (the dark times) When last we left our puppy chronicle, all was relatively well. Koa was healthy and growing and rocking the basics of house training. But then winter set in...as did the dark times. Koa started to grow and explore. We learned the hard way puppies explore their world through their mouth. That includes you. And those puppy teeth are precision sharp. While Koa slowly but surely learned that mouthing and biting were not acceptable,