|   Thank you for all! 
  Thank you for all your kind advice... I actually took some video before going to the vet last night (I thought I was being a little obsessive --- I'm glad that some other people would have done the same thing!). I called my vet and he told me to watch him for another day or two... He said that Porky could be coming down with (or getting over) something, and if things don't improve or get worse we'll take further steps. I will definitely insist on the blood/liver and neuro tests that you all suggested. Porky's symptoms are not very severe (I saw some videos on YouTube of fly biting, and he's not doing that)... It's almost like what he does when his bangs get too long and he moves his head tying to look at them...
 I may just be overreacting (Porky is my first dog). Thank you all again for your advice! I will let you know how things go over the next few days.
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