Well I'm thinking of taking him in this week between Thursday or Friday.
And, As for the Microchips;
Microchips: Are Pet Owners Being Misled? - Dogs Naturally Magazine You can read here about it.
Not everything can be a rumor just because we don't hear about it happening right?
I'd want to remove it if it causes him problems and makes him uncomfortable. As dogs get older I'm sure the chip is capable of moving around. So it may cause discomfort in the one spot since he flinches whenever we touch right there.. and then go to stroke down his back. That's what led me to believe it's possibly the chip causing his discomfort.
That or Allergies. Maybe his eyes are itchy or something and it causes him to flinch when being patted out of the blue..? I don't know but hopefully we'll see the vet very soon.