Regarding the posted image.  For what its worth.  I find the lighting flat, the pose with the one eye is a awkward and a little spooky to my eye, and the dog hasn't been groomed and prepared for the photo shoot.  I understand that the conditions were difficult and the subject and owner were not cooperative, but the challenge is always to make a beautiful portrait in spite of the situation.  I think this falls a little short.
That said, Diane...I have these sort of sessions, too.    I've worked for over an hour with one subject and owner and gotten nothing that I want to put my name on.  Cats (and Dogs) have their own agenda sometimes.
Now...did you get a good group shot of the litter?  :-)