2 part question: Dogs and neighbors?

It is 4:48am where I live.

I am awake because there is a puppy crying as loudly as it can in my neighbor’s yard.

Yesterday I asked them during normal daylight hours to please do something about the dog crying.

They said it is 5 weeks old and they are training it to handle being alone.

1. Is it necessary for them to do this to the dog? It seems to me that anything that causes an animal to cry like that is not humane. But I know nothing about dogs.

2. What is the next step in dealing with them? I asked them to do something about this once and it seems not to have worked. Can I call police non-emergency over this? I don’t really want to piss them off since I have to live next to them but this is pretty unacceptable.

The puppy is still crying.