I have a 6 week old puppy that I rescued at the age of 4 weeks. He was sleeping through nights very well, and now is more active and decided he doesn't like sleeping through the night anymore.

As of now I am torn on how to treat this. He is still a baby and may be crying because he is scared or hungry, or because he just wants attention. (potty arrangements for now are potty pads outside of his crate which he uses flawlessly).

Ideas? Ignore it, or check on him?