No.
no because it is old enough to eat puppy food. so giving the puppy milk is unnecessary for it.
feed it and find out
Well if he doesn't pretend to not be at home and he'll think there is no food and he will eat
That depends. What are you feeding him/her? If you are giving him puppy food he should be eating. If he isn't, take him to the vet.
a puppy age is week old
. Get your puppy to the vet.
A two week old puppy is blind but when its eyes open it can see.
Yes.
The puppy can get sick.
If the puppy is 4 weeks old or older soak some dry puppy food in water loosen up with a fork and he/she should eat it and about 2 week all teeth in they should eat the food dry good.
take it to the vet immediately