It's difficult enough to go through the grieving process yourself and now you have to be concerned about others too...your fur-family, poor souls.
I think Barb hit the nail right on the head. I too watch "The Dog Whisperer" - in fact, just started watching and just last week, Nat'l Geo. had a marathon of his shows at night, so I think I must have caught up on the past few seasons,
Dogs are pack animals and will always look to the alpha of their pack. If your dad was your shephard's pack leader, then he probably is going through some turmoil in addition to his loss. Years ago, when I had my first two dogs, both Golden Retrievers, Chivas and Soda (yes, I loved scotch and worked for the company at the time)...when we had to put down Chivas, my little Soda slept in my closet for two weeks. I think she was just feeling so insecure without her bro and grieving his loss too. Let's face it, animals have emotions too; it's just they express them in different ways.
Glenda, I know of an awesome animal behaviorist that actually trains in Illinois - northern burbs of Chicago, but if you want to email me directly and give me a little more information, I could pass it on to him and possibly get you some advice. We trained privately with him for a while when we were having some problems with one of our dogs...dominant aggression, and he is the next best thing to the Dog Whisperer...maybe even as good or a bit better. His real expertise is with northern breeds - Huskies and Malamutes, which are the most stubborn and you should see him work them...and it's all positive reinforcement. Anyway, I rambled too much here... Glenda, I do feel for you. You've been through so much and now you are trying to heal. That may be part of his issues too. Dogs do sense our "energy" and your grief could be upsetting to him too. I wish you well, angel,