In the wild, it pays to blend in. It can be dangerous to stand out. That's how your timid dog thinks. Watch the body language, it tells all.
These dogs cannot be wheedled or coaxed into accepting or trusting, even from a dog lover. You cannot force them to "get over it." And you must never punish them for refusing to cooperate or trying to protect themselves. A bite is the result of a half a dozen earlier warnings that went unheeded.
Don't let visitors approach, pet or pick up these dogs, no matter how dog-devoted they are.
Gate off the entry hall so your timid dog won't escape as people are entering your home. Thanksgiving shouldn't end with the tragedy of losing your dog.
Put your dog in a safe place during the holiday dinner hubbub. Leave them with an Everlasting Treat Ball, Bully Stick or other engaging Chew Item and give them the gift of peace of mind.