Our Daisy does that as well; I haven't really thought about it occurring near nap time, but that may well be.  I have just assumed that if she were with her siblings, they'd groom each other.  Since we are her pack, she grooms us instead ... at least that's what I've been thinking   
Oh .. hello, I'm new here.  Really nice forum!!  I can't wait to dig in and learn from what the members have discussed.   
Cray     |