I am sorry you are having this problem and hope all is well. It is good that you are having her checked out by your vet. Since she was recently boarded at a kennel, she could have picked something up while she was there. Being boarded for 4 days after a couple hectic weeks could invoke behavior changes, but I would expect everything to return to normal after the excitement...including her behavior. Since it has not, I'd want to make certain she was not coming down with something or suffering any type of injury from being boarded. All our best to you with hugs from the kids!
