a puppy age is week old
No, I do not believe that you can get a puppy that is 3 weeks old. As far as I know, the puppy of any breed has to be at least 6 weeks old in order to take it home. Sorry if this answer is disappointing, but the puppy has to stay with its mother for that long.
. Get your puppy to the vet.
A two week old puppy is blind but when its eyes open it can see.
You may find help at the link below.
Yes.
The puppy can get sick.
Well if he doesn't pretend to not be at home and he'll think there is no food and he will eat
Yes you can give a 3 week old puppy milk. Because I have a 3 week old puppy and drinks it fine. So the answer is yes
Leave him at home while you walk the big dog and play with the puppy at home.
No.
A five week old puppy that is throwing up clear liquid every five minutes or so should be seen by a vet. There is not much that you can do for the puppy at home. If this puppy is away from its mother, it is too young. Puppies can become dehydrated very quickly, it is important to get the pup medical care right away.