My Hudson didn't do this either. I was becoming very worried. At about maybe 10 months he started coming up to me and just going "MMMMMMMMMMM" a low gutteral growl. I learned very quickly this meant "I need to go outside mom" after he did it a few times and then peed right in front of me. Be patient. I think it is a very good sign that your pup goes near the door when she has to go out. I guess I would consider that "asking".