Just the cutest darn thing you've ever seen.
It will look much like it's parents only smaller.
Keep it in warm conditions, lying on a blanket and keep it with it's mother.
It really depends on the breed you have or are looking at. You should talk to your vet about a healthy puppy.
Give it some food and watch it grow...!
He's about to die!
a 3 week old puppy is too young to leave it's mother, it hasn't been weaned yet. when you are shopping for a puppy make sure that there are no visible sores, look for fleas; check the gums make sure they are nice and pint (if they are too white, the pup may be anemic).
You can bathe him/her once a week,and try a flea collar.
. Get your puppy to the vet.
The puppy can get sick.
Yes.
a puppy age is week old
cuz it has weak little legs.
It may have worms, you should let a vet have a look at it.