Denver-Aurora-Lakewood, CO: CBSA Type: Metro: CBSA Division: CBSA Division Name: CBSA Population: 2,543,482: CBSA Division Population: 0: MSA: 2082: MSA Name: Denver-Boulder-Greeley, CO CMSA: PMSA: 2080: PMSA Name: Denver, CO PMSA: City State Key: Z11413: Preferred Last Line Key: Z11413
Puppies generally stand by day 15 and take their first wobbly walk by day 21. By age three weeks, puppy development advances from the neonatal period to the transitional period. This is a time of rapid physical and sensory development, during which the puppies go from total dependence on Mom to a bit of independence.
Most dogs are still puppies, in mind and body, through the first two years of life. Two to four weeks: Transitional period. 1  Puppy is most influenced by his mother and littermates. 2  Eyes open, teeth begin to come in, and senses of hearing and smell develop.  Puppy begins to stand, walk a little, wag tail, and bark.