But others are automatic â though not guaranteed â such as the jump from private first class to specialist. Once a private becomes a specialist, he begins prepping for leadership. This is a crucial time in his molding process because he will soon enter the ranks of the non-commissioned officer corp.
1 Puppies will stand up and start walking. 2  At the age of 3 weeks a puppy will develop its sense of smell. 3  At 3 weeks the puppy will begin to bark and show social development such as wagging its tail, growling and baring its teeth.  Up to the age of 4 weeks the mother will be with the puppy almost constantly.
Rating Newest Oldest. Best Answer: The general rule is 5 minutes of walking for 4 weeks of age so a 12 week old puppy should be able to walk for 15 minutes. This is a very loose guideline and varies with how much exercise the puppy gets playing at home.If the puppy starts lagging you have gone to far.est Answer: The general rule is 5 minutes of walking for 4 weeks of age so a 12 week old puppy should be able to walk for 15 minutes.