Past couple days have been really bad for my dog. It started that he wasnt walking much being less and less each day. Yesterday, he canny walk anymore he has no control of his limbs, as I have to completely carry him to move him. He has not gone to the bathroom at all either and is only barely drinking water. Recently he is now having contractions in his neck and face having him always be moving/twitching his head. Now he is barking consistantly and haven't figured out how to stop it yet. Vets office isnt open till the morning since it has been the weekend. What do you think it is??