That's what I thought, but in the three years I've lived here, I've seen maybe a handful of flies. I live in a very densely populated urban area, really don't see a lot of bugs at all. I checked his ears pretty good too, though I imagine some would really go in there.

I kinda got nervous it could be fleas or something but he's on a preventative and not itchign or anything.

So as I mentioned, it started right before we were about to go on the walk. Since coming home, he's shaken like twice over the past hour (versus like every 30 seconds on the walk). I also brushed under and around the ears to make sure he wasn't getting knotty as he can definitely get knots around there if I don't brush. But he actually enjoyed the brushing, no knots or anything.

I was thinking maybe its something with his harness or collar. He doesn't love when I put the harness on but its not something new to him. I also took off his collar when we got home.